1. Organize and stick to a regimen/schedule.
2. Actually make sure you're enjoying it. This was my first mistake which led me to drop out of college 1 month in. Enrolled again a year later, in a course I actually enjoyed, even if it had lower employement. Barely had to study at home since I was so interested in the lectures and everything was crystal clear in my head. Ended up getting an award for best undergrad, which made later job interviews quite interesting.
Admittedly, I'm from one of the "poorest" EU countries, and education & employment here is so much more affordable and lenient respectively.
I susbcribe what this roll >>5980
said. Make sure you know exactly what you're looking for in college, work towards it, and don't waste time with anything else.
Ultimately, my own goal was to get a white collar job I minimally liked and allowed to me to start anew and build a career abroad, in Japan particularly. I was sick of working in a deafening and hostile factory from 00 to 08AM, and wanted to lead a life both me and my waifu could be proud of. I often joke the reason I got said award was "because I didn't try hard enough".