Warm-up
If you have been following Adam Ondra for just a little longer than today then you will know the interesting moves he makes before he would start climbing. If not have a look at the youtube video where he shows a small amount of them. It will take him at least 30 minutes to warm up.
On the wall warm-up
Try to warm up all parts of your body. So that all bodyparts get used and ready for climbing. Make sure they are easy and under control. Dont tire yourself to much so that you have more then enough energy left over for your training. Take enough rest time between the boulders (2 minutes). Exercise on different styles of boulders problems.
Adam would do this on a 7a, maybe stick to your own limit :).
Projecting
The main course of the training should be about trying hard 5 to 10 boulders. For these try to start with the fysical hard boulders and finish with the more coordination and slapy climbs.
Take at arround 2/3 minutes rest between attempts, when the boulderproblem is fysical take more time (5 minutes).
Dont get stuck on one boulder problem for too long. Do up to 5 / 10 attempts on a single boulder problem and move on.
For each attempt find improvements for feet placement or movements. If you do not learn anything new or make any progress in the next attempts this could be a sign to move on.
If you get stuck on a specific move, try this in isolation. Then when you learned it you can try to try it from the bottom up.
If you flash to many boulders, then probably you are choosing to easy boulders and you will have to challange yourself more.
Source
https://www.youtube.com/watch?v=SLJTwFQE10A
https://www.adamondra.com/tips-tricks-episode-1-climb-smart-boulder-training-efficiency/