6 expensive things that are totally worth the money

Travel can be good for your body and your overall well-being, NBC reports. O’Connell said that it’s something she spends money on herself. “I love to splurge on travel because it brings me joy,” O’Connell said.

As Business Insider previously reported, people are happier when they spend their money on experiences rather than things.

Sleep is essential to good health, according to the National Institute of Health. It only makes sense to invest in a mattress that provides optimal comfort, even if we can’t get the suggested seven to nine hours nightly.

“We spend 5-8 hours a night on our mattress, depending on our sleeping patterns. Getting a good night's rest affects every other part of our life,” Ma said. “If we don't get a good night's rest, we won't be productive at work, may not get that promotion, and may just feel like crap. A good mattress is good for your health and will pay for itself in the long run.”

If your clothes don’t fit well, they won’t look good, regardless of what designer made them. So instead of thinking about what brands to splurge on, think about how to make something a custom fit.

“I think fit is much more important than the name on the tag,” Ma said. “No matter what price you pay for your clothes, make sure they fit.”

That means paying for alterations, such as shortened sleeves or pant legs, he said. “Nice-fitting clothes make a huge difference.”

Both Ma and O’Connell agree on splurging on services that help save you time. “Time is the one thing you can't get back,” Ma said.

“If you work in a time-intensive job (and even if you don't), then outsourcing certain services could be worth it, including cleaning, painting, and general house repair,” Ma said. “Living in NYC, I swear by delivery services as well (food, clothing, etc.) and doormen — they make my life so much easier.”

“My boyfriend and I both use meal subscription services like Hello Fresh, and we recently hired someone to clean our apartment once a month,” O’Connell said. “We're at the point in our lives where time is our most valuable resource, so paying for things that help us buy back some of our time makes a lot of sense.”

Who wouldn’t want to invest in his or her own health? For O’Connell, it’s the most important expense.

“I'm big on healthy things — group fitness classes, fresh produce (I'm a vegetarian), and the occasional fresh-pressed juice (even though it can be ridiculously expensive),” O’Connell said. “Beyond my physical health, I find these expenses provide a ton of value to my mental health.”