* Prices are crazy in the City. Lesson: don't try moving to the Bay area without $1-2M in cash on hand.
* Student loans are predatory. Lesson: avoid student loans. Study hard, get scholarships if it's obvious that you can, and otherwise plan for community college for the first couple of years. No one cares where you did English 101.
* Government research grants are shrinking. Lesson: don't waste time seek research support from the government. There are plenty of other folks looking for ways to spend their money. My job is to show them a way.
The most valuable things you have are time and health. Focus on conserving those.