Went to SD %: 8.33%

This number is low. It should be about 20%. My guess is that you're getting discouraged when the flop doesn't help you. I find it helpful to keep in mind that the flop misses most people. It probably didn't help the other guy either.

One of the areas that I'm working on is trying to be more aggressive in those "could go either way" hands," and make them profitable by increasing fold equity.

If you can get 20% fold equity, those 50/50 hands become 60/40. It's one of the more subtle things that can help a bottom line.