Everything you do before you swing, determines how well your shot will turn out.
You need to review the basics no matter what your level is as a golfer. Only once you have a solid and consistent set up, can you develop other areas of your game like consistency and power. Spend as much time as you possibly can perfecting your set up. Check your grip, posture, and ball position. Once you have corrected any flaws, then you will want to rehearse setting up in the correct position. This is something you can do inside or away from the golf course. It only takes a few minutes to work on these basic fundamentals.