I bought a cheap hammer and wanted a nicer grip than the bare wood. Thinking of how nice a linen wrapped pool cue feels, I decided to try wrapping this handle in cotton string.
The only tools I used were a knife, a pair of scissors (but I should have used the knife!) and a bowl of water. The only material (aside from the hammer itself) was a length of cotton string and a short piece of nylon monofilament, which I did not even have to detach from the spool.