Pruning

[ZandraJoi]

Do you have a system of when & how you prune? Do you do it seasonally? Or perhaps only when they are in need of it? Do you pay attention to the "rules" of when you should prune? i.e. in the spring or in the fall?
We don't prune that often but when we do, it's more for when they need it rather than a seasonal to-do.