Hitting my wedges

Played yesterday and frankly my mid irons, my 5&7 woods and my driver were decent.  Putting not bad either, one 3 putt in 9 holes.  Couple of one putts too for pars.  BUT my wedge play sucked the big one.  I've got it in my head to hit a mid flighted wedge from 50-80 yds with back spin.  I can't do it.  Tried it with my sw and my lw.  I mean I hit my lw(old Carbite) about 60yds when I hit it good.  My sw about 20-25 yds further from a good lie.

What I ended up doing is skulling the ball.  Sometimes it would land on the green but towards the back and most times it would end up in front of the green.  Point being is that some were worm burners, some were 5 footers or so but most were like rockets.  So my question is how do you hit a mid flighted wedge with back spin like you see the pro's do.  I've even practiced it at the range and the most I do is the above.  Maybe the flight should be like I am hitting them and I am not hitting down enough for the back spin thing.

I also noticed that when trying to hit it lower with back spin I need to hook my right finger more down the shaft.  To hit my wedges higher I use a bit stronger grip with my right hand, neutral with left and my pointer finger more close to my hand in general, you know not as far extended down the shaft in a hook pattern.  So what's the key to this shot?  thanks

Thanks for the links.  A bit different than what I what I looking for though.  I want to be 20-70yds out or so and hit a med height shot with back spin to make the ball check up.  Chipping around the green I am actually not to bad at.  Depending on the lie, distance, green layout I'll vary the use of my clubs.  Use basically the same stroke just some different lofted irons.  thanks

I'm no expert, but maybe you should buy a better ball (at least, that what I blame my lack of spin on).

I think the ball I use is good I'm just looking for advice on technique more than anything.  thanks