There's supposed to be a lot more prep involved, and keeping track of that. It's why I like Warlocks. Two slots, few spells, few invocations. It's only complicated as you're creating him, once he's worked out, you know what you can do and when.
So lets do this, I'm going to make a template to put at the end of all my posts. It'll list my current power points and my current skills, as well as where I got them. And my current Focus. And I'll list when I switch focusses, and if I don't specify that I change my known skills, then I didn't. The last play test of this was all over the place. Let's do this one right and keep track of all those little things.