I have decided to give the FSI Thai course a go. The Foreign Service Institute released their courses for a number of languages to the public domain a long time ago. The courses are old fashioned but they have text and audio and a very reasonable price (free).
I am using the wiki backup and also the extras at thai-language.com. The thai-language.com dictionary resources are useful as I am not formally studying the written Thai language yet (I don't mind looking at it and starting to guess a little though).
Mostly I will be listening to the audio, I will report back on how useful I find it.