Slammin'SAM
Never a flatbelly
I will give you a practice drill that I've given before on THP - it is the best simulation of actual golf round putting and I think more useful that hitting x number of 4 footers in a row.
Go to the practice green, and choose a 9 hole putting course, with a variety of distances and slopes - choose putts of anywhere from 15' to 45-50'. Take two balls and play your "course" with a par of 2 for each ball on each hole. The goal is to complete the 9 holes under par (35 or less). Putt out EVERY putt. Don't leave the green until you shoot under par on that course.
I find that this practice gives you all the pressure that you feel on the golf course on the shorter putts, most especially on the last few holes as you try to make your goal; it also gives you a realistic variety of such putts, as well as improving your feel for distance on first putts.
Go to the practice green, and choose a 9 hole putting course, with a variety of distances and slopes - choose putts of anywhere from 15' to 45-50'. Take two balls and play your "course" with a par of 2 for each ball on each hole. The goal is to complete the 9 holes under par (35 or less). Putt out EVERY putt. Don't leave the green until you shoot under par on that course.
I find that this practice gives you all the pressure that you feel on the golf course on the shorter putts, most especially on the last few holes as you try to make your goal; it also gives you a realistic variety of such putts, as well as improving your feel for distance on first putts.