I forgot to mention before that there are patterns that you could learn pretty easily that are used throughout the song. Once you memorize the pattern, it becomes pretty easy.
Quote: "Try different colored circles for sets, I'd say."
I've been able to change the note color for a long time, but haven't taken advantage of that ability. Because there aren't really "sets" like in "Elite Beat Agents", I will try making the color alternate "Red, Orange, Yellow, Red, Orange, Yellow, etc."
Hopefully it will end up like, "I just hit a red note, so I know that orange one over there is up next."
I'll try that out right now. Thanks for the idea Bizar Guy! I didn't even consider using colors before.
EDIT: Just added it, and don't think it made a big enough difference. Now I'm adding a red border around the note that you have to hit, and a yellow border around the note after that. Hopefully that will help.