If you have a table with four legs you can get the risers sold at Walmart and put under each leg. Worked great for me on a white 6' folding table I was using. Brought it up just enough so my back wasn't hurting as much. :-)
I also use my dining room table to cut material. Hassle when it's time to eat, but I don't have the room anymore for a separate table. Anyway, I cover the table with one of the sewing mats that fold out. It gives me just enough extra room in length and width I need and protects the table. I have to prop the ends up with chair backs since the table is shorter than the mat. :-)