How I trim is I set a general amount of flowerage(made up term for this made up definition: the term used to describe the amount of flowers present) that seems like the plant should be at during this stage in the grow. Then, remove all growth that is lesser than that, this way, it will only focus on making better buds, rather than making more buds. If I'm too high and that didn't make sense, my bad, lol.

-C