Ed Adams suggests that when you have "training races or regattas" (those are ones that you have not indicated in you planning you are serious about) that you stop and watch the good guys doing something that you need to do better.
You don't need to take a lot of time to do it, but instead of concentrating on sailing fast you concentrate on watching.
Pick the races that don't count toward your goals.
If you can't watch, ask the good guys/gals afterward. They will probably be happy to share with you if you promise not to beat them right away.