One Christmas I did 8 quilted projects, from large quilted pillow covers to wall hangings to lap quilts. Once it was over--I didn't sew for a few months to catch my breath. (I'm a teacher so there wasn't a lot of spare time before the Christmas break.) I read a few good books in my spare time afterwards and let my sewing machine rest. I totally enjoyed doing it--and there was pressure to do something for one niece/nephew if I was doing something for another--but it was all worth it when I handed them out--all the folks getting them were at one place, so that was fun.
Let your heart lead you to finish; picture the joy on the recipient's face as he/she opens your treasure--then take as long a break as you need to when the last stitch is in place. :-)