Once, a while back, I tried to use notecards when noveling to organize and develop my novel. The idea (a fairly common one, I believe) was that each scene is noted on a notecard, and you can then visually order them and add/remove scenes; it creates a high-level overview that helps with pacing and flow, and finding superfluous scenes to cut or holes that need an added scene.
I liked the idea, but I couldn't make it work in practice. About halfway through the novel I had a stack of less-than-useful cards, that didn't seem to add any value to the noveling process. So, I abandoned it.
Lately I started using Scrivener - which has a notecard feature - so I want to give it another shot. I think my problem may have been what I put on the cards. Some had lots of detail, others quite sketchy, and generally what I put on each would seem important at the time but later had me wondering what I meant.
So, What should be put on scene notecards to make them useful? Especially, what are the set of things that should be on all notecards to make them useful as a whole as well as individually?