I tried the elmers glue basting and didn't like it (thick lumps of glue I had to quilt through, took too long to dry), I tried spray basting and hated it (the spray goes EVERYWHERE), so I still prefer to baste by hand (pins add too much weight and need to be removed when you get to the needle).
I use Sharon Schamber's method of hand basting with the two boards. The board keep the backing/batting and top flat and straight - it's really easy. Yes, it does take a long time, but it's worth it for larger quilts. I also use water soluble thread to baste so I don't have to worry about quilting over the stitches. If you're going to wash the quilt when finished (I always do to remove the spray starch), the basting thread comes out in the wash. If you are not going to wash it you can give it just a light spritz with water and the stitches come out.
If I have something small to quilt (placemats, small wall hanging) I will take it outside and spray baste it.
Here is a video to Sharon's method.
https://www.youtube.com/watch?v=bhwNylePFAA