Beware claustrophobics! It is giant maze of sois (small lanes) that house what seems like thousands and thousands of stalls selling everything you need or don't need, like your fifth pair of fisherman's pants.
Take small change with you. Remember that it is the land of smiles, so when haggling do it with one. And do it reasonably, get a few items from the same stall and you're more likely to get a discount.
Keep your bags close and in front of you at all times.
It can get hot in there, so remember to stay hydrated!
It can be easily accessed by Bangkok's Skytrain, get off at either Mochit or Chatuchak Park, if memory serves.
Enjoy spending your Baht! :) about 6 years ago