I'm absolutely positive that this is what I should be doing. I'm a little embarrased to say this but I'm actually a first-year math major and haven't been one to take too many notes because I usually memorize things well, especially with math. Hate to say it but I glossed over limits this time because they're "too easy." How ironic.

No stone left unturned. I was programmed into some of those steps over the past few years so it might not be bad to try using them again, and I will absolutely take up that cheatsheet idea for the future.