I start in the lower left, then work my way around to the lower right, upper right, and then upper left. Then I brush the fronts, and focus a lot on brushing the backs cuz I always manage to miss spots on my inside-front teeth. That's for any time I brush. At night, I go a step further and I'll floss, brush through very quickly and gently again, and then mouthwash.
I always brush my teeth twice a day, and sometimes I'm gonna go out or I had a dessert or sometimes I just don't like the way my mouth feels and I'll brush in the afternoon.
I've always had good dental hygiene and I hate bad breath and weird mouth feels so I have to clean my mouth to get it out.