Automatically remembering a draft when writing a new post

I just lost two hours to write a post in Game Design And Theory and lost it all.
I may will never be in the mood to write it all again.

Please, make the forum save a copy of the draft every once in a while. So even if i come back the next day to finish writing my post, i can keep from where i left it.

A button for “Save” could be a good thing too.