Why don't you find the WIP or UFO thread on this forum and commit to finishing something. I have multiple projects going at once also, and I just started a new one. HOWEVER, two of the "almost finished" have deadlines coming up and I have to have them done (or look stupid :oops: ).
I also participated in some group projects and although the contribution was small, it felt good to send something out UNDONE yet complete for my part.
Another option I use, is to make a deal with myself that I MAY NOT start something new until something existing is done. I think of it this way: Quilting is an art that is best appreciated DONE. 25 quilt tops won't keep anyone warm. :wink: