Quilts:
I think with your quilts, this shot is really successful:
http://www.etsy.com/listing/41380921/summer-fun-funky-windows-twin-or-lapthe key to large pieces is to show some background in them:
http://www.flickr.com/photos/mimiandsky/sets/72157625035355547/it could be folded up in it's natural environment on a bed or a white background or folded and draped over a chair, foot board or ottoman.
Bibs, Keychains, Organizers, Purses:
I'd pull back in the shots a little bit. They tend to be too closely cropped. You present them in varying ways, which is excellent.
baby t-shirts:
I'd use a wood hanger or a padded fancy baby hanger and take full shots of the t-shirt or much closer shots with the frame cropped to center on the graphic with some of the hanger showing and a sleeve.
your color is great and the angles you take are great. :)