For 1/2, I like Lee Jones pre flop advice, except I play less low suited cards and two gappers than he reccomends.

For a typical lose, soft 10-handed 1/2 ring game:

For JJ, TT, 99, you want to avoid having 3/4 opponents. If an EP raise will give you 1, 2, 5+ opponents, then do so. If raising will give you 3 or 4 opponents, and calling will mean a lot of people will see the flop with you, then call with hopes of catching a set. This is discussed ion sklansky+malmuth's holdem book. When in doubt, raise the TT and call with 99.

In EP, you should limp with KQo or AJo, but there is no harm in folding them if you are new. KQs and AJs should not be folded in EP. Limping with AJ or KQ in this type of game means that many people will be limping in with worse hands, but raising them will cause many worse hands to fold, but all better hands will call. Be careful that in loose games, top pair is vulnerable: you will need to apply pressure early, but restraint later if you get pushed back too hard, as people like playing A2o and K2o, then calling if they hit their K/A but raising if they catch two pair.

AQ: raise. AQo shouldn't reraise though.

If you are folded to in fourth or later position, always raise TT, 99, AQ, AJ, KQ.

If an unknown or strong player raises before you, then fold AJo, KQo in EP. If the raiser is bad, and your raises are getting respect, reraise with any hand you feel like playing against him heads up.