I'm a college student selling $13K annually on Poshmark. Here's the daily routine I follow to juggle resale and school.

• Ali Dieguez, a Gen Z entrepreneur, sells thrift clothing on Poshmark while attending college.
• Last year, she made $13,740 in sales on the resale app.

Ali Dieguez's resale business started with a few pairs of Lululemon leggings she found at a local thrift store. She liked to stop in occasionally after training at the gym next door.

The leggings weren't her size, but they were too good to pass up, so the 23-year-old sold them on Poshmark — a resale platform that allows shoppers to sell clothing and accessories. For some, it can become a lucrative side hustle and for others, it can be a full-time business that earns six figures.

After Dieguez sold the leggings, she didn't sell on the app until about a year later, when she needed a job. She was studying kinesiology at San Diego State University and wanted something that would fit into her busy schedule between classes, workouts, homework, and Muay Thai. She realized that resale was just the thing.

She started selling activewear on Poshmark in January 2020 — right as the category boomed — during the early months of the pandemic as demand for casual clothes picked up. In October, Poshmark announced a pending $1.2 billion acquisition by Korean e-commerce company Naver.

"It turned out to be perfect because March 2020 was when the pandemic happened and everything shut down," Dieguez said. "I was super fortunate, because if I would have gotten a more conventional job, I probably would have been let go."

Last year, she broadened her inventory to clothing like dresses and denim. She also lists items on other resale platforms such as eBay, Mercari, Depop, and Curtsy to tap the wide scope of customers.

In 2021, Dieguez made $13,740 in sales on Poshmark, which Insider verified with documentation. Dieguez put $3,668 of her earnings toward her college tuition last year and plans to complete her bachelor's degree after one more summer course. To continue her career in wellness, she's saved much of her resale earnings to enroll in a one-year massage-therapy program in the fall.

When it comes to managing school and her business, Dieguez meticulously schedules her days. Last semester, she usually woke up at 5 a.m. and went to bed around 7 p.m. "I was kind of boring," she said. "I had the same schedule basically every day, but it worked."

Here's what her daily routine looked like when she was in school full-time and running her resale business, as told to Insider.

The following has been edited and condensed for clarity.

I woke up at 5 a.m., checked emails, and did my homework.

I do homework in the mornings.      Ali Dieguez

For me, timing is very important. I'm definitely a morning person: Sometimes I'd wake up early at 4:30 a.m., but for the most part, it was 5 a.m.

I checked my emails for anything pressing. Then, I did my homework because I find I'm the most productive right in the mornings.

I went to the gym at 6 a.m.

Starting my day off bright and early at the gym.      Ali Dieguez

I went to the gym for an hour to do strength and conditioning. It's HIIT — high-intensity interval training. I shower there and then go to school.

For breakfast, I normally would have a smoothie and sometimes I have snacks to bring with me to class.

Classes usually started at 8 a.m.

Post-workout meal and more homework. This was registration day for the fall term.      Ali Dieguez

I'd try to schedule 8 a.m. classes because I like to get everything done in the morning, then have all my classes back-to-back if possible. I didn't like any gaps. I might have two classes in a day.

This past semester on Mondays and Wednesdays, I had a two-hour break, but I would stay at school and get my homework done, or use that time to post listings.

Around noon, I ate lunch and practiced Muay Thai.

Post office trip to drop off sales.      Ali Dieguez

I finish classes — hopefully — by early afternoon, then have lunch. I'm a Muay Thai practitioner, so then I'd go to my MMA-boxing gym to train in the afternoons.

I saved a lot of money by meal prepping; I'd go grocery shopping on Sundays, then cook my meals for the whole week. It takes about three hours, but I don't mind cooking. My schedule was boring because I did the same thing every day, but on top of that, I ate the same food every day.

Sometimes I have an afternoon class or fit in some thrift shopping.

Quick stop in a nearby thrift store.      Ali Dieguez

If I had time, there was a Goodwill close to my gym where I'd try to squeeze in a quick thrifting trip. Usually, I did that on Fridays, when I didn't have any classes. I dedicated the weekends to reselling, so that was another way I tried to block my schedule off.

Some days, I went back to school for a 2 p.m. class and my last class would end at 4 p.m.

At night, I did more homework, posted some listings, and went to bed by 7:30 p.m.

Catching up on Poshmark notifications when I'm back home.      Ali Dieguez

If I had any more homework, or if I could get some listings up, I'd do that in the late afternoon. Then, I would eat dinner and go to bed.

Since I'm a kinesiology major, a lot of my classes were labs and I didn't have a lot of homework. I was fortunate to not have to block out too much time besides the reading. If I could, I tried to get an audio book so I could listen to it in the car or when I'm photographing clothes; I listen to a lot of podcasts or audiobooks while I'm photographing.