I don't know if these count as tips so much as what I did...but they worked out pretty well for me imo (disclaimer, I was Chemistry and before, during, and after college mostly worried about on a personal and professional level academics).
-Take a full load of classes every summer. Assuming you're moving away from home/family, you'll probably still get to see them for Holiday so don't worry about it.
-If you can't sleep, study more
-Get two minors, one related and one unrelated, to your major.
-Start taking grad classes in 2nd half of your undergrad to push yourself
-Take more Math than you think you'll need/want
Possibly the most importantly: Actively fight with the passion of a thousand burning suns the bureaucracy and Sisyphean weight they will try to put on you from unlocking your potential or learning what you want to learn. Not always brute force, sometimes subterfuge, sometimes negotiation, sometimes glib charm, but do whatever it takes.
Always happy to talk if you want to PM me.