1. Live here. (Two-week shortie incursions don't count, duh!)
2. Live here - the Thai way. (gated moo-bans, condos and all-falang isaan villages are not the best way to include Thais in your everday life, unless you count the service staff and bought wives, respectively.)
3. Know the Thai ways of doing things (or make an effort to learn them).
4. A few Thai words go a long way...
5. Most important: integrate, don't separate (duh, again).
Do all these things and you will be a well-integrated farang. However, regardless of what people call you to your face, or how they treat you, you will always be farang.