Once done with a quilt, I prefer not to have any left over blocks. I usually make them into a throw pillow, double sided (if I have two blocks left over), or a pillow case (that way the pillowcase can be used as the gift bag, who wants to spend MORE money on wrapping paper after you've already made a quilt), or sewn into a strip with left over extra fabric from the quilt and safety pinned together as a means of 'wrapping' the quilt for decent presentation to the recipient.
You can also make 36" square small quilts and donate them to your local hospital's Neonatal Intensive Care Unit! I know our unit can always use quilts for the babies who need special attention! Or make small quilts the size that will cover a changing pad for diaper bags. What new mom wouldn't want to receive a thoughtful gift for their newborn??? Changing pad covers would be quick to finish, as they're not big at all! Good luck!