I'd advise an amateur to look for reasons to fold.
A lot of amateurs look for reasons to play, and thereby play too many hands or get into sticky situations. Thinking like, "Maybe I'll flop two pair" or "Maybe my A/4 will flop an Ace" gets you in trouble. But if you think "I'll only win if I make two pair, which isn't likely" or "If my Ace pairs here I'll only be able to play for a big pot if an opponent has an Ace with a bigger kicker" you stay alive.
The thing is, there are always reasons to play. Any hand can flop a full house. What keeps you from doing so are the bad things, like not getting the right odds