Thanks for the tips..

If I put post-it notes around my screen, I wouldn't be able to see the screen..

Not my fault I have bad memory..

The reason why I can't remember my yahoo account, is because my account was created by a friend, and it has been such a long time since I used Yahoo. And you know, I actually enjoyed using Yahoo, because it is easy to chat with new people. More reasons for me to reinstall it I suppose..
