A few thoughts from a hack:
1. Since getting a Bushnell range finder, I'm shocked at how inaccurately I gauged yardage compared to the Bushnell laser device. It's a big confidence booster having the correct distance to flag.
2. Having more tools. I try to keep those shots at 120 - 80 yard range. I now have clubs that when swung full on are perfect for those yardages. 9, PW, AW, 54 and 58* wedges from 110 to 75 yards. Another confidence booster--I don't have to 'take something off' a PW to make it go 80 yards.
3. Swing back slowly and accelerate the club head through the hitting area. It's a short shot so it's easy for your mind to tell you to slow down at the wrong time ... which is exactly the time we should accelerate through the hitting area.
4. There always seems to be more trouble short of the green, (traps, rough, other bad stuff) than beyond the stick. Make sure to take enough club and get it to the hole. Swing with confidence.
My league partner does the same thing. Drives it 270 then beefs a short iron to the green. Each time, I can see him slowing the club down on the way through the shot. Big ole alligator of turf comes out. Ball goes about 30 yards. Not the result any of us look for in this situation.