Here's a tip I wish I could share with someone I know...someone I spend a lot of time with but can't really speak candidly with:
If you constantly tell people how cool you are (or how cool something you did is, or how wonderful a job you do) you instantly become WAY less cool. In fact, you instantly become pretty lame.
Giving yourself a pat on the back every now and then, asking for validation or sharing something you learned is totally cool. Touting you're awesomeness is not.