I am a big fan of glue basting. In addition to Elmer's brand I've also used Dollar General brand which is 2 bottles for $1. You can't beat sandwiching a quilt for 50 cents! I use the same method as Stitchnripper. I also have the fine tip to use for bindings and seam junctions but here would rather use clips or pins.
Remember however you need to wash it out so if you're making a wall hanging or something that isn't going to be washed you should use another method of sandwiching your layers.