It is very nice having several different thinkgs going at one. I crochet beanies for the military. I am currently making beaded christmas ornaments. Then my quilts....and then I like to make banners for the holicays.....If I get bored with one I put it aside.
I also find it is a good time to put your sewing space in order, cut up, put away, organize...and you ususally find something that interests you that you had forgotten you had.

Sometimes you just need to take a break. I used to find that when I was doing a lot of cross stitch. I would put it away until I was ready to work on it again. I keep thinking I am going to hit that wall with quilting, especially since I try to go out to my quilt room every morning, but so far my interest hasn't waned. Hope for it to continue at least til I finish the quilts I am working on for my sons and DIL's.

I usually go through this every year just after the hollidays. I simply get worn out. I used to let it bother me but now I simply use the time to chrochet, read , look at quilt books ect. and don't worry about it. sometimes it will last for two months. But then when I get that sudden spurt of energy watccchhhhhh out!