Time yourself while you brush.
Divide your mouth into quadrants and spend 30 seconds on each quadrant. Keep a watch in your bathroom to help you out.
Bad breath? Brush your tongue!
Try breathing out while you brush — this should help to suppress the gag reflex.
Don’t forget to floss!
There are stinky, nasty bits that live between your teeth that won’t come out with just brushing. Flossing is super important. If you don’t want to fumble with the string, they sell little floss picks that make it a breeze.