Chipping is my favourite, using blades and chisels to get under the finish and chip it off the wood.
+1 Broken glass is an effective stripping tool (wear gardening gloves though). Pull the glass towards you in long sweeps at above 45 degrees to the surface you are stripping. As your piece of glass gets blunt break a fresh piece. Practice on a varnished piece of scrap to get the hang of it first. 8)