Here are resources we have collected for people interested in teaching English.
Accommodation
Agoda is useful for booking your first week's accommodation. After that you will probably be able to track down some cheaper accommodation in person.
airbnb.com tends to offer fairly pricey accommodation in Thailand but there are bargains to be had.
TEFL Courses
Tanya and I did our TEFL course at SEE TEFL Teacher Training in Chiang Mai, Thailand. We had a great experience there and the local knowledge they gave us and the local contacts helped us get jobs in the area.
SEE now also run a paid internship program where they run a condensed 2 week course before placing you at a rural school for one semester. It didn't exist when we went to SEE but if you haven't taught before and want to get out and see the real Thailand it actually sounds pretty awesome. Click for more info on the SEE internship program
There are of course plenty of TEFL schools around Thailand. As with everything I or anyone else tells you, do your research before committing and handing over your money. Check that they can provide you with assistance getting a B visa, check that affiliations implied by their institution name actually exist and find out what their past students are saying if possible.
Job Boards
Buying and Selling
ThaiVisa.com has a classified section devoted to motorcycles as well as forums filled with all sorts of Thailand related chatter.
Further Education
When evaluating an education course it is worthwhile checking the requirements of the education department in your home country. For example, here are the requirements in Western Australia.
Here are links to two institutions. Both of these organizations are primarily focused on remote study making it possible for you to study even while you are in Thailand.
Open University Australia currently has 23 education related courses containing 294 education related units.
The Open University is based in the UK and has 20 education related courses available.
Getting Around
I have seen several services allowing you to buy train tickets online come and go. Currently I am not aware of any way to purchase tickets online. We have never used on and have always resorted to physically going into a train station.
Seat 61 has incredibly detailed information about rail travel in Thailand and elsewhere.
What to read more?