"Fly as often as you can, minimum once a week. Otherwise you'll spend a lot of time re-learning stuff."
I agree with that 100%
Prepare for each lesson and memorize the procedures that are going to be trained
Add to that go over each one in your mind afterwards
I would also add.
1) While it is good to keep the number of instructors involved down (I had a total of 5 different during my 43 hrs) , it never hurts to get another guys opinion
2) Try to make sure you get an instructor that you get on with. They are professional and shouldn't let personal issues cloud their judgement, however there is nothing worse than being taught by someone who winds you up
3) Try to find out what the next lesson involves and study it in advance
Just one further thing. I turned up to a lesson when I was not feeling 100% (little sleep and a slight feeling of sickness). That was baaad news as what I didn't know was that we were going to do slow flight & stalling. I didn't chuck up, but did feel really bad. I still remember it every time I do a check and have to do stalls now (x years later)