There is  an unwritten law that says, “You never have enough clamps.” But, if you choose your clamping tools carefully, you can get a lot of versatility out of relatively few clamps.
 
Double Bar Clamps - Wide panel glue-ups are made much easier by using Double Bar Clamps, a unique, two-way clamping system that holds your workpieces perfectly flat while it squeezes them together.
 
3-Way Edge Clamps are ideal for gluing veneer tape or solid hardwood edges onto plywood shelves, etc. They’re very inexpensive and will save you a great deal of time when performing this specialized operation.
 
 
Some tips on clamping:

• To make sure all joints fit properly, dry-clamp all components before gluing.
• Mark all workpieces carefully before clamping and gluing for accurate assembly.
• Use a Double Bar Clamp or alternate Aluminum Bar Clamps (one above and one below) when gluing edge-to-edge to prevent buckling.
• Use small pieces of scrapwood as protectors to avoid marring workpiece surfaces.
• Small rubber bands, clothespins, and stationary binder clips make great clamps for many different jobs.
• Always maintain a liberal coat of linseed oil on hand screws to prevent glue build-up on the jaw