Here are some tips based on my own experiences:
1. If the girl who answers the door doesn't strike your fancy, ask to see the other attendants. If that's not allowed, make an excuse and leave. Most places will let you choose.
2. Know what you want each time you go (quality massage, extensive "extra" options, top notch eye-candy, specific services (back door manipulation), etc. ). Use massageplanet.net to find out (by searches, not questions) where you can reliably get what you want.
3. Unless money is no object, or you're certain that you want extras, beware of places that have extensive menus. The women there will resent you choosing a cheap alternative and will give you lacklustre service if you do. The women make very little money from the door fee.
4. Avoid places whose FS reputation is discussed indiscretely on the Boards. Why risk being a "found in" in a raid when there are so many good MPs out there?
5. If you find good service - repeat. Most good providers only get better as you become a regular.
6. Only tip if the service is exceptional (or if you want to establish a "regular" relationship on a good note). Prices will creep up quickly enough without your help.
7. If the MP is busy to the point of a line-up, don't wait. The guys in front of you will be rushed and so will you.
8. Gently approach any touching/kissing/activities that you're not sure are allowed. Either ask first, or approach them slowly, giving the girl a chance to say "no" before you're already "there".
9. The "going" rates for massage are: $40 for 1/2, $60 for 45mins, $80 for 1 hr. + 40/60/80/100 for T/N/NR/BS "extras", although prices certainly vary.
10. Poor hygiene on your part will lead to poor service from the MPA.
11. Don't ask alot of personal questions (age, how long in Canada, where worked before, etc). Many MPA's fear Immigration and/or Police. Don't give them a reason to think you're a cop/fed.
12. It's ok to ask an MPA to slow down if she's trying to set a world record in finishing you off (unless that's what you want). You did pay for the time.
There is, of course, a lot more that could be said, but this advice and that of others should get you off to a good start (pun intended)!