This is a forum where we typically talk about the kind of backpacking where we're out in the wilderness, not wandering through another country. I could give you tips on good hiking boots for rocky trails, but I suspect you'd rather talk about how to budget or good places to stay in Bangkok.
You might find more help somewhere like Lonely Planet or some forum focused on the European type of backpacking.
"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzukihttp://hikeandbackpack.com