Early Position Play in Low-Limit Texas Hold ‘em
Short answer: Play tight.
Need more information?
Ok, with no raise in front of you, big Aces and big pairs can be raised. Middle pairs and painted one and two gappers can be called, but must be played very carefully after the flop. If you’re a beginner, fold them. So much of the play associated with these cards is situational that you can easily get yourself into trouble with middling hands. Tight is right.
With a raise in front of you, you’re looking for a reason to fold. You should only attempt to re-raise with big pairs and maybe AK. The range of hands you should be willing to call with pretty much begins and ends with AQ and TT. Other than that, you’re looking to fold.
Lee Jones has a great section about this, including a breakdown of hands to play if you’d like to build yourself some starting hand charts, in Winning Low-Limit Hold’em. I would also suggest spending some time at the low-limit tables at Full Tilt Poker, because there is no substitute for experience.