Finance and money forum

Hi all ! was hoping to get some advice please...
I am arriving in bangkok on the 22 feb and fly out on the 31 March. In my time I would like to see some of the Islands and head up to laos to travel on the slow boat. Don't really have many 'plans' as I have learnt that you usually change them once you arrive anyway ! I am travelling on a strict budget (around €600). I was thinking that it would be a good idea to head to the islands first as I have heard they are more expensive and then up to laos for the remainder of my time... Any suggestions, hints and tips to make my trip more enjoyable and budget friendly would be very much appreciated !! Thanks