The backswing and downswing are two forces moving in different directions. One is backwards that becomes forwards. The other is away that becomes downwards and then ends up forwards. Make sense? Probably not...but watch this video & also understand the role of each in great ball striking.
Club fitting can be a helpful path to improvement. BUT... We need the clubs to not suit our swing we test with- we want our clubs to suit something else....the future. Watch this to learn why you should take some control of your fitting.
Keeping the left arm and shaft in alignment is a great key to success. In this video I show a student how to work on this and it also helped solve the way his right arm was working at the same time.
My teaching has almost worked on the principle of allowing the student to be able to understand and fix swing issues. Here is an example of that with the very visual Drill Six. 
This student is a very good striker of the ball, but her hip action caused some inconsistency from time to time with start line and shaping.
Part 3 of Geoff Ogilvy showing his keys to a better pitching and chipping game. Save strokes around the greens with these tips.