Hey Slinggalin,
Aren't you here in Southern California somewhere? Dumb question as it says so on your post. PS area if I remember? Maybe we can meet someday as we are pretty close. I am in San Bernardino. You asked where I lived when I first joined the board.
I just started learning Thai when I came back from my first trip in April. In my opinion, without a teacher or anyone else to help it is going to be something you can not do casually. You will need to apply yourself, but I am finding it fun and I have nothing better to do while waiting for my next trip in October. I know a bit of German and have had 3 years of Spanish, but this is the first language I really fell motivated to learn and I believe that will make all the difference.
As the other posters said, start with Pimsleur. The overwhelming opinion seems to be Pimsleur is the best. I am on lesson 8 out of 30 lessons at 30 minutes each. I use this in conjunction with several books and two web sites.
Here are the web sites I have found incredibly helpful. The amount of information on both these web sites is amazing. On this first site you can find just about every word or phrase has been recorded by a native Thai speaker which can be played on your computer. The main dialog box on the opening page of this first site will except both English and Thai script and translate either way. Number one:
thai-language.com
Number two by a close second is
Learning Thai the Easy Way
both have their strengths.
I have also purchased "Thai for Lovers" which has a lot of phrases, even more than the book Nicke sells, "English-Thai Bar Guide", but I would also get this one and use both. I also purchased The Bua Luang WYSIWYS Thai Phrase Handbook only available at a bookstore in Thailand. Took 3 weeks to get and a bit expensive. It is so much more that a simple phrasebook. I am on page 68 and haven't really gotten to the phrases yet. Filled with great information.
The Bua Luang WYSIWYS Thai Phrase Book
The best English/Thai dictionary I found has 3 dictionaries in one, English/Thai/Transliteration. This way any Thai lady you are with should be able to look up what she wants to say by looking in the Thai script section. This book is by Benjawan Poomsan Becker the same author of Thai for Beginners which I also have, but will not get to until I have finished the Pimsleur courses.
I also wrote up a primmer on how to type the Thai language on your computer. I have found this to be essential. You can find that here. Don't know if you need to be signed up. If so PM me and I will send it to you, but this is a good forum you should consider joining.
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Hope this helps.