Work your way back from the green in practicing, getting putting down, the 3 footer counts the same as the drive, then chipping, then scoring irons to long irons to woods. I did this after reading Harvey Penick's Little Red Book, focused on chipping and putting and broke 100 in one round and then 90 the next and have only shot above 90 twice since then, that was probably 18 years ago. I agree with staying in the fairway and not losing balls of course, but if you can be really good around the green it can make up for so much elsewhere and make breaking 100 easy, especially if you are close already. Then it takes more work on the irons and approaches to shoot lower. I'm also a big supporter of moving up tees while you learn to score and if I get in a funk I will play a round from the "Senior" tees to just try and go low and gain confidence. No reason to be playing from the back tees and shooting over a 100 and struggling, Im not advocating to go up to the front tees, but if your home course has 4 or 5 sets of tees, swallow your pride, move up one set and have more fun, if your buddies are good golfers get them to do it with you and let them have driver wedge and reachable par 5s all day. After all we are all amateurs and out there for fun, stay relaxed and loose, the scores will reflect it.