Most days the journey is just the journey, but get lucky and the journey is the destination. The Great Andaman Trunk Road, a skinny singletrack line of tarmac bisecting much of the archipelago, fits neatly into box number
It's always great to find a reliable "fixer" who'll get you where you need to go. In Ranong, on the Andaman coast Thai/Burmese border, it's a guy called Pon. Just get his cafe / travel empire in the middle of town and you'll be fine.
If you roll off Koh Phayam on the afternoon boat, then the 24 seat New Mit Tour VIP coach is the BEST way to get back to central Bangkok without being dumped out at the Sai Tai Mai Bus Terminal at Highly recommended