1. Keep your head straight and facing the horizon. Stay alert and aware of what's going on around you to the best of your ability. That means you can't eyeball that hottie in the short-short-shorts, even if she is checking you out.
2. The quicker you turn the bike, the less you'll have to lean it. Learn to pick a point/spot that you will initiate a turn, even if you don't turn at that exact point all the time. Its a good mental exercise and it keeps you focused on doing what you're supposed to be doing quicker and more efficiently.
3. Master your brakes. Practice using them as much as you can. Preferably not in the street in traffic. Improve your braking reflexes and learn how the brakes respond so you don't panic and over-use them in a high stress situation. Master the front brakes especially. They've got about 80% of the bikes stopping power.
4. Know your OWN limitations and be true to yourself. If you find yourself exceeding past limits comfortably, its because your riding has improved. Keep it up. Your riding has NOT improved if you make some rash, dangerous, totally unecessary and utterly stupid move that 'looks cool' and the good Lord somehow spares your life. Practice and ride safe.
5. Wash your hands when you're done in the bathroom. C'mon you nasty, non-hand washers know who you are