I lose my mojo when it comes time to sandwiching part: top, batting, and back. Ughhhh. Just the thought of having to do this on two quilt tops that are on my to do list gives me horrors. I would much rather be sewing or piecing.
I tend to have other things to work on- reading, beading , scrapbooking, or card making. I find that if I focus on something else for a week then I can face the part I don't like on a weekend. Overall, I just make sure that when I've lost my mojo for quilting that I have a diversion.