Thanks to all for the advice.
Just some follow up. I'm 56 and have been trying to play golf for about 20 years. I have been sidelined by injuries during that time, once for 2 years, and once for 1 year.
I've used about 4 different instructors, each for a long stretch at a time. I've changed because the instructors either retired or (one) died. One recent instructor I've had is good, but he goes to Florida for the winter and I can't keep up with him after he leaves. I've also gone to golf schools twice. Never paid much attention to magazines or books. I've been videotaped several times. I've spent thousands on lessons and schools over the years. I have decent super game improvement equipment and play forgiving 2 piece balls. I've been told that I have a fundamentally good swing, and on tape my main flaw is what I'll call my weight transition during the down swing, but I also have consistency problems.
I have a hard time reproducing good swings. If I leave the club face open, or make a poor transition, or another flaw, I can't feel it compared to a good swing, and don't know if I'm reproducing the same swing. Thus I can't fix it and my shots are very erratic. Sometimes I'll have a really good day with a lot of good shots, and then it'll all go to hell my next round. I'm "best" with short irons and worst with longer clubs, as I suspect most are.
Things just came to a head after my incredibly bad round on Saturday and I became massively frustrated and disappointed.
I think for me the best thing to do at this point is to try and find a good local instructor. I've been down that road, but I think that is what will help me the most. I'll ask around for references and see what happens.
I could use some advice on how to practice well between lessons. What can I do to try and better feel my swing and get more consisitent?
Thanks to all. The replies are truly appreciated.