All of previously given suggestions work for me also. Don't suppose anyone else forgets as much as often as I do.
Since time is spent figuring out where to start on a WIP, I write myself a note as to the date I last worked on it, and what needs to be done next. It really helps me.
We learned at guild not to store fabrics in plastic bags unless you leave open space so air can circulate. Someone showed a picture of a quilt which had been stored in plastic with no breathing room, and it was totally Yellow and rotted.
M.