14 ways 20-somethings should invest their time to set themselves up for long-term success

There are a number of life skills people need to master, and your 20s is the time to start practicing. Without the pressure of parents or school to motivate you, you'll need to exercise discipline and motivate yourself to learn the essentials.

These skills can range from patience and dealing with rejection to living within your means and good table manners.

"There is nothing that will help you more than reading," says Deepak Mehta.

He suggests a wide variety of books, from young adult fiction to law, from Dickens to Tzu, to learn more about contrasting viewpoints. "Do not be afraid of coming across a convincing viewpoint that is totally antithetical to yours," he says.

Reading is also a great way to exercise your mind, says Jereme Allison, because it activates almost all areas of the mind. "The mind is a muscle. If you don't use it, you lose it," he says.

Francesco Wang refers to this as "life-extending" time.

"Investing time in caring for your health ... will certainly yield you more time, literally — in days, months, if not years tacked on to your life," he writes. "Yet we often take our health for granted until we experience a wake-up call."

Instead, he suggests proactively investing your time in your health by eating well, exercising regularly, getting plenty of sleep, regularly seeing your doctors, and taking care of your emotional, mental, and spiritual health.

Wang cites the "Good Samaritan" study from Princeton University in 1973 that found whether the person was in a hurry had a huge impact on if they'd stop to help an injured person — only 10% of those in a big hurry stopped to help an injured person, 45% of those in a medium hurry stopped, and 63% of those not rushed at all stopped.

"This means that being in a rush may be preventing you from being the kind of person you want to be — the kind to stop and help someone in need," Wang says. "Building in lots of cushion time in your schedule and preventing 'constant hurriedness syndrome' is a great investment in yourself and in the quality of life of those around you."

Whether you join a book club or knitting circle or head to the pub for karaoke or trivia night, Mehta says it's important to meet more people outside your friend circle and get rid of your social anxiety. It's important to become more comfortable around others in your 20s.

"I know after college one's social group often changes, so joining organizations helps one expand their circle of friends," Hunter McCord writes.

Growing your cirlce of loved ones and spending time with them is not something you will regret, he says. "I never heard of anyone at the end of their life wishing they spent less time with loved ones."

As the stresses of daily life become more burdensome in your 20s, it's important not to forget about taking care of your mental health.

Mehta suggests starting a mentally stimulating hobby like playing chess, role-playing games, or solving puzzles to keep your mind sharp. Hobbies can also be a good creative outlet or an exercise in relaxation.

Garv Suri recommends spending half an hour every day alone to get to know yourself better.

Tonya Turpin says actively becoming aware of what's going on inside your head is the only way to truly understand yourself.

"You will never have this much energy, health this great, or this much disposable time again in your life," writes Heidi McDonald. "Make the most of it. This is your best chance to make a difference in the world."

The beauty of saving for your retirement in your 20s lies in compound interest, Allison says. Even if you open a retirement account today and put in $5 a month, "the effects of compound interest on that extra decade or two can literally mean the difference of hundreds of thousands of dollars more that you will have for your retirement."

Similarly, Tanmoy Roy suggests having fun, but living frugally and allocating some money to pay off your debt on a monthly basis. You may not be saving for a home just yet, but down the road your student loans could prevent your future home ownership.

To find a meaninguful cause, McDonald suggests keeping up with the latest current events by following the news.

"Chances are, you'll find your passion, whether that's a cause you're interested in, or a niche you believe you can fill," she says.

Sanjay Kadel advises being wary about where you get your information. "Don't believe in whatever is there on the internet," he writes. "Do some research and then conclude whether it should be registered or eradicated."

"Fail," advises Arpit Sethi. "Merely out of our teens this is the best thing that can contribute in the making of an adult. The more we fail, the more we learn."

You'll never have more energy or ability to think than when you're in your 20s, says Shulamit Widawsky, and you'll never be more vulnerable. This is the time to push your limits and recover from the failures that are inevitable when you take risks.

"Knowing what you can do, and what you can recover from, will make the whole rest of your life more successful," she says.

"One great habit is a weekly review to look back at the past week and lay out the one coming up," says Curt Beavers. He advises pondering:

1. What went well last week? (Celebrate and continue these.)

2. What didn't go well? (Stop, overcome, or remove these from your plate.)

3. Based on the answers above, what changes do I need to make to make this week better?

It doesn't matter how much you travel in your 20s, says Shrey Garg, but rather how you travel.

"Don't be a tourist but a traveler. This will help increase your vision and make you realize how big and small the world is at the same time," he says.

The key according to Allison is experiencing new things.

"Get to know that there is a bigger world out there. Learn about other cultures. Try new foods. You will be surprised at what you discover."

Mario Hari suggests traveling with complete stranger. "Experience the motley mindset of people. And if you study their emotions carefully, you will get an intuition about what every soul is searching for," he writes.

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"People aspire to live a memorable life, and there's this tragic reality that most of us don't," says Dustin Garis during his TEDx talk last year.

For two years Garis travelled around the world, and on his journey he says he learned that "life is not the number of days you live; it's the number of days you remember."

The key to living a memorable life he says is pursuing a memorable life through breaking out of routine, incorporating change everyday, and the "epic and everyday acts to save the day from being lost."