Think about what your actions will do before you do them.
Think more, **** up less.
As I recall,I as still working on my parking after 6 months of lessons.Do you mean parking in general or a particular type,like parallel etc?
Some people get on better with parking than others just try and go in with a positive attitude and not "omg I'm not going to be able to do this right" and put your mind to it.It'll come,just stick at it.
If its bay park.... lower your wing mirrors so you can see the white line when it appears
Slowly reverse (snails pace), turning when needed
Obviously check back window etc for observations
Look in the wing mirrors so you know whether to adjust the steering to the left or right to get in the bay etc
Yesterday I got my permit. And I nearly rear-ended myself into another car while parking. Practice makes perfect I say...