I use spring clamps mostly with this product : http://www.jevonstoolco.com/
Or, with F-clamps for glue-ups as spring clamps tend to creep and move the workpieces as glue works like a lubricant. Spring clamps are used where quick maneuver is called for, such as attaching a stop block to the cross-cut sled or saw fence. I have about 40 of them in various sizes lying around in the shop.
Simon