>I'm saving up money for at least 6 months while I study very hard in my free time to get high marks on ACT/SAT and (hopefully) earn scholarships to attend a de

>I'm saving up money for at least 6 months while I study very hard in my free time to get high marks on ACT/SAT and (hopefully) earn scholarships to attend a decent undergrad university This tells me you're young. Depression didn't creep in on me due to a sedentary lifestyle at that age either. Our bodies age, and as you get older if you don't exercise or eat a healthy diet (for a very strict definition of healthy) you'll find lethargy creeping in. You'll have a harder time staying up, you'll find your body takes sleep when it craves it. When I was 18, I used to be able to stay up for 2 straight days and it wasn't a big deal. I'd spend a whole night coding, then go to work, no problem. Those days are over, though. Now if I stay up all night coding, I have to crash for a couple hours before I start again.