Long, long struggle trying to figure out how to do it consistently and do it well.
As far as equipment, I got a long flosser (it's shaped like a toothbrush, but has floss things on the end) and an electric toothbrush (it beeps to tell you to switch from one quadrant of the mouth to the other, and turns off when it's done).
As far as assistance, someone (without talking at all, although that's a peculiarity of mine possibly, I can't handle verbal prompts with toothbrushing) hands me the flosser, then when I get done with that, they hand me the toothbrush. Ideally this happens at least twice a day.
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams