In a full ring No Limit Hold'em game is the right hand selection of the first crucial step to profitable play. Decisions on the flop, turn or river you may need to meet only once or twice per round, but pre-flop decisions you make in each hand. These can cost a lot of money - or save.
Money you save is in the long run as good as money won. Save yourself so unwise bets and do not play these more marginal hands. It is quite difficult to create guidelines for pre-flop hands. There are so many different factors that one must note that many players probably argue that it is simply impossible even. I will be careful, therefore, to tell you, you should play this hand, and those not. Rather, I will give you the information to hand, you need to make the right decisions at the table.