I visited Thailand and LOVED it. I stayed on Khao San road at a hostel, can't remember the name, but there were lots. I wish I could remember the name - I'll dig through old journals and try to find it.
Anyway, our hostel offered a 'Floating Market' tour - it was SO amazing! Highly recommended. My friend and I had landed in Thailand the day the airport was being shutdown because of protests. (this was Late November 2008 I believe)
I remember, I thought I was being so clever because I kept trying to negotiate with the taxi drivers, but they all gave me high prices I had read were not normal, so I kept saying no. Finally a Thai man came up to us and started to speak Thai to us. Seeing our blank expressions, he said "big boom" and made a cutting motion across his neck....that's when we knew we should probably leave. We jumped into the nearest cab and took off. This explained the lack of negotiating - everyone was fleeing the airport.
It was so crazy to ride into the city and see protesters jamming the road going toward the airport, screaming and singing. We were nervous, but the protests were totally peaceful and there was never any danger to us. But our friends due to fly in the next day never made it - we were so lucky!
Aha, sorry, back on track.
Anyway, the floating market tour was so incredible. You get into these little canoe-like boats and someone rows you around these floating markets stalls that are laid out on the edge of the canals. It was so fun, and everything was so colorful. Then we were taken on a motorboat through these waterways (outside the city?), that went along people's homes. Also included in the tour was a snake show, where these snake tamers had snakes slithering all over the place, the guys were grabbing the snakes with their mouths....incredible!
I'm getting carried away, sorry, I just had such a great time there. I wish I could go back with you!
Eat lots of Pad Thai, ride the Tuk Tuks like there's no tomorrow, check out the amazing temples, and get up early to watch the monks going to temple.
Also, if you like Thai food, consider a Thai cooking class. I really enjoyed mine. Most of the stuff we did while in Thailand I got from trip advisor. It's a great resource, check it out.
I'll try to dig up some photos and post them for you!
Have a blast!