Travel the world. Party with friends, within safe limits do sex, drugs and rock and roll.
Get a job at a company you like, learn stuff, educate yourself, better yourself, become an awesome software developer.
Buy a car that's too expensive, crash it, be stuck with the loan for six years.
Try to start your own startup, fail, go back to zero.
Have 20 girlfriends/boyfriends.
Have fun, live life, and at 35 don't sit around regretting that you gave the only youth you'll ever have to online advertising and increasing the ridiculous wealth of Larry and Sergey.
If you do that, you'll have an empty heart where your soul was meant to have been forged.