I use Roxanne's Glue-Baste-It and have used washable, acid free glue sticks for basting. I have also spray basted -- but it is hard to do inside with the smell. I plan to use Elmers school glue once I empty the Roxanne's bottle since it is much cheaper. Don't know if I have to thin it down or not.
I do starch when I have washed the fabric, but if I do not wash it then the sizing is usually stiff enough.