Personally, I don't like to go into a game or a match with any preconceived notions of what I should or shouldn't do based on things like the size of the table, the person I'm playing against, or anything else. Of course it's good to be aware of these things, and I'm sure you will get lots of good advice, but it seems to me that there is really only ever one possible gameplan in pool: Take advantage of your opportunities. Do the best that you can with the situation you are presented with, shot after shot after shot. You're either going to execute correctly or you're not, and I don't think a gameplan can have an effect on that.
I'm no great player though, so maybe I should be coming up with better gameplans... :/