First and foremost buy a laser range finder. Find yourself a football field or other place you can measure off yardage from 10-15 yards. Make targets at each of these distances, get your shag bag and take your wedges. I carry a 60, 56, 52 and 48pw. Now learn how far a 1/4, 1/2, 3/4 and full swing goes. Take some masking tape and write each of these distances on your shafts. I.E. a 1/4 swing 60 goes 20 yards. You will have to become consistent in your take aways and disciplined in your swing lengths. I think this is a variation of what Pelz teaches. If you are really comitted to the game, lay down a couple grand and go to one of Pelz's short game academies.. I would bet they could solve your problem. A lo of places wont let you practice on their grass,, I used to carry a piece of driving range turf with me when I wanted to practice, of course that was in Iraq, where I did a similar process as above.