Travel Biz, Retreat Sales

[Kartika]

Does anyone have knowledge about working with travel agencies, either in Thialand or other regional countries (esp. Singapore)?

I am looking for some arrangement with one or more agencies to help sell/promote retreat programs in Thailand and regionally.

What I'd like to know, if possible:

How deals between travel/tour agencies and the service providers normally work? Is there a more or less common structure?

Best ways to find and approach agencies (prior to pounding the pavement )

Names of reputable, reliable travel/tour agencies in Bangkok or elsewhere in Thialand, who would list and book retreat packages?

Anything else I haven't thought of?

Thanks!