I like to make a small Trip Around the World in 5" flannel squares and use fleece for the backing--no batting. Super quick and cuddly!
Another one I like to make is Bille Lauder's, "There's a Dog on my Quilt." There used to be directions on HGTV's web-site. The pattern is also available for purchase from
http://www.easymade.com
D9P, 4 into 9 and 4 patch posies are also simple & quick. 4 patch alternated with fussy cut squares and the good old fashioned single Irish Chain are all easily done in a weekend.