Quoting Kitty123
Okay, so after looking at the options, this is my first rough plan! Please let me know if it is:
a) stupid
b) ok, but i would change...
c) great!
Thanks
BANGKOK
Thanks for any help / advice 
K x
A little "B" with comments.
How long will you be in Bangkok before you leave for your next place? Is it just land and a few hours later take off? Why not spend a day or two in Bangkok and see the city. This will make it easier to make your connections.
You have a lot of beach areas, did you ever consider seeing some of North Thailand - like Chiang Mai so you can see some of that part of the country? Bangkok is worth a visit too! You could take a train up to Chiang Mai if you want and see some of the things that make Thailand unique. There is always lots of beaches in the world, for some people you see one you see them all!
I would take the train to Butterworth/Penang it is more comfortable. Just around 2 months ago I took the train from Bangkok to Hat Yai and made it from there to Butterworth (no train when I needed one!) From Butterworth/Penang I used the train to get to Singapore via KL. Interesting train ride. They did have some cheap chicken dinners available. There are a few shady bus companies, some advertise that they have toilets on board but they don't want you to actually use them!
In Hat Yai, not far from the RR station there is a hotel called the King Hotel. Across from that hotel is a travel agency that can make arrangements for bus travel if needed.
Do you fly back to Bangkok at all or do you go home from Singapore? Have you priced a round trip flight to Bangkok compared to flying into Bangkok on a one way and out of Singapore on a one way - if that is what it is? Sometimes round trips are much cheaper in the end. Or even a round trip to Singapore and then work your way up to Bangkok and then back to Singapore?
Good luck.


[ Edit: Edited on Jan 2, 2009, at 1:15 PM by karazyal ]