There is a form you'll fill out that asks about how you do all sorts of daily things from dressing yourself to shopping to work etc. When you answer it emphasize how much trouble you have doing the things, not that you can do it. (ie, I can do this but must nap afterwards and need help to do most of it). A very similar form goes to a care provider (for me my therapist) and they fill it out the same way. The agency will also request medical records from anywhere you tell them you've been treated. In my case I had 2 hospitalizations in a few months just before I applied. I'm sure those helped me get approved. I also gave them information for my psychiatrist, family dr., asthma dr and then to be extra thorough I listed every dr. I had seen in the years I was allowed to submit (I think 10?).