Since I have extremely limited space (live in a motorhome) and my body just won't let me get on the floor, I will find various places that have the room and tables I can use to layer. Places like churches, senior citizen centers, etc. where I can put 2 or 3 tables together to accomodate the size of quilt I need to layer. I either use Sharon Schamber's method (
http://www.SharonSchamberNetwork.com) with a little adaptation or simply use painters tape on all sides of the back. I will often use tape in addition, especially to attach the leader edge of the fabric onto the board, to keep the fabric taut and straight to start with.