I top, prune, lst, hst, supercrop, fim, defoliate, lollipop, pretty much anything to keep them under control, or to not shade out other plants.
But really in most situations its just limiting the plant size with the pot size, and knowing when to put them into flower which i typically do at 3-5 inter-nodes for seedings, and it varies for clones, but the autos are all new to me so i still have to figure what they like. Ideally if i can get the plants to go through their whole cycle without me touching then i'm happy.
I also typically remove the odd fan leaf that is shading other plants or bud sites, and remove lower bud sites that will just end up being fluffy waste.
Sometimes things misbehave and stretch into a light, which is when ill typically supercrop, or literally make loops or S's with the stems to reduce their height, but if i notice them before hand that's when i top them, just to slow them down.
In my other box i currently have a topped Cherry Bomb, and Critical Cheese specifically because of them looking to stretch to much, and i have two crosses that misbehaved and kept stretching that i had to supercrop yesterday, and now have loops in there stems which only takes them about 1-3 days to recover from.