Focus on algorithms first and syntax last. Solve problems, then code.
If it uses power, has an I/O interface, and stores code, you can do stuff.
Dont get caught up in the little shit like specific code formatting and who's right or wrong between tabs or spaces. (It should be TABS anyway.)
Don't take shit from anyone.
Be confident not cocky.
Learn GIT as much as you can.
Don't burn out.
Get up and stretch.
Don't argue with your Operating Systems professor about why you shouldn't have to learn Linux.
Don't fall into the "I want to be a game developer" trap. Make your own games on your own time. You won't learn shit at school about it.
9/10 of the real world workforce is who you know, so don't be a dick. Those people might be the difference between Ramen noodles and steak dinner for you.
Charge market competitive rates and set an hourly rate that defines the clientele you deal with.
Don't ever, EVER, do trade or spec work. Free work don't pay the bills. Always start the clock when you're not sleeping, eating, or shitting. If you're emailing, calling, texting, or otherwise interacting with or on behalf of a client, bill them. Don't be a bitch when they decide they don't want to pay you. Get yours. Watch "Fuck You. Pay Me." at least once a month on YouTube.