When the pepper plants look like they are starting to grow better, I like to remove the growth tip. The growth tip produces auxin hormones that travel downward, and inhibit buds from growing branches. When the growth tip is removed, branches grow. That means more blossoms and fruits, and a stockier plant less likely to fall over. I'm also trying that with some of the eggplants this year.
Chili Pepper Before Pruning.
And After pruning.
Eggplant before pruning.And After Pruning.