I go high in hypo, but not manic. For early signs, cleaning is a biggie for me too (and OCD only compounds the lengths I go to(!))... taking on big projects with tools scattered everywhere... driving too aggressively... getting hugely annoyed at how stupid and slow people are...

But if I had to say the most common "first" is, it'd be talking way too fast and way too much. With cleaning a close second.