For a new player, and some of us who have played for a while, I suggest what I call the 4 P's.
Patience - take your time, wait for good hands
Premium Cards - play the top 10 hands, or even top 5 when you are first learning, folding all others.
Position - use the power of position to manipulate other players
Practice - Practice, practice, practice....you need to see thousands of hands and how people play them to improve your game. Play free games online, play in neighborhood free games and small home tourneys, head to the casino...if you want to get better you need to play in as many different scenarios as possible.