My 2c (from a low time PPL) in addition to the great advice offered so far:
To expand on what Silvare and BigPistons said, only on very rare occasions can you turn a bad approach into a good landing, but experience has shown that its always possible to turn a good approach into a bad landing
. If you are not prepared to go around then you are not prepared to land, so if you don't like what you see, go around and try again.