Let's see, here are some ways that I've done it/experimented with.

1) Bullet-point system.
This is a bit challenging, and I haven't had much success with it yet. First of all, the bullet points are unnumbered. I like my things basically numbered. Still, this could work for you if you like general ideas.
I would think that for general plotting, this would be a possible, work-able idea.
2) Point A to Point B system.
This is still a sort-of list, but I thought it would be worth mentioning. It is loosely numbered and in tidy chronological form. You could probably either do this two ways:
A) Idea (basically four or five lines per scene)
or
B) Scene (slightly harder, one paragraph per scene)
3) Description system.
This would probably work best for me. A brief description, maybe with a quick summary of who's in the scene would work best for my novels. It would be worth experimenting with as well.