Absolutely can't do to save my life:
1. Write a treatment
2. Use index cards
3. use a beat sheet
4. make an outline
Besides that, I just write away and try to hammer away at it until it's done. Sometimes, the previous days work is shitcanned, mostly, it's not. On a bad day I can't even crack of a page. On a good day, I have done up to 20 pages when an idea really takes hold and I must get it out of my head.
Normally, I am quite happy with five pages.