1. Youtube- Youtube is AWESOOOOMEEE!! Lol. Definetely the best thing on the internet.
2. Facebook- Coolest social networking site. The applications are awesome, and its not all messy and slow like myspace. :x
3. Tengaged - come on of course im gonna include tengaged on the list :P
4. Yahoo!/MSN - what would you do without email? and IM is awesome.lol