To the original poster: 3000 hands isn't very many, and I wouldn't fret too much at this point. The fact that you're seeing the importance of reading the board properly at this stage is a good thing [img]/images/graemlins/smile.gif[/img] Players a lot more experienced could do with this attitude.
To add to what's been said already, once you determine the possible hands out there, you need to integrate that with the likelihood of those hands being out there. This is based upon a combination of the probability of them against random hands, and considering the action of the table. Reading the board is important, but you need to remember that it's just a part of trying to figure out what your opponents may have.
Good luck
KC
http://kingcobrapoker.com