1. No beard or moustache until you're old enough to drink. Goatees are OK.
2. There are core programming skills, and there are technology-of-the-week skills. Instead of worrying terribly about the latter, worry about getting your core ability to design and test efficient, maintainable code. Definitely play with functional languages instead of the enterprise-y fad-of-the-week.
3. Don't hang out with other geeks all the time. Branch out as often as possible. This will help you be a better programmer, businessman, salesman, and will probably get you laid more.
2. There are core programming skills, and there are technology-of-the-week skills. Instead of worrying terribly about the latter, worry about getting your core ability to design and test efficient, maintainable code. Definitely play with functional languages instead of the enterprise-y fad-of-the-week.
3. Don't hang out with other geeks all the time. Branch out as often as possible. This will help you be a better programmer, businessman, salesman, and will probably get you laid more.
[Edit: added some explanations]