In Montreal I used to look at the agency web site for "who's on tonight" and then I would go back to the main web site to see all of the photos of the girls. Next I go to the reviews on MERB and start reading. I pick two or three and call the agency.
All that changed with all the GTs that have been thrown over the past few years. Now I go to the parties and talk to the girls and if there is chemistry I put them on my list. I also was able to meet several hobbyists at those parties and compare notes. Sometimes a hobbyist will say "you have to see girl [XYZ]" and so I will call her. I can honestly say, I am still working through my TDL from the parties. There is even a girl on my TDL from the very first party I attended. Developing a report with a good booker is also a good way. I met a few over the years at GTs as well.
In the USA, when I know I will be in a specific area of the country, I do a search on TER by one of the many search functions. I add the girls to my favorites and when I am to be in that part of the country, I will send an email or PM and introduce myself and tell them what I want and try to make an appointment. I also have found the "Other Cities" thread on MERB very helpful. ISG is great for outside of North America.
Like EB, I have acted on a lot of advice from MERB members. So many, I may have lost track but Patron and Smuler could be travel agents. Inside Montreal, Cobra seems to have his thumb on the pulse. There are so many more guys that have made suggestions over the years such as Iggy, Rumples, Special K...
Without the parties and without meeting several SPs, Agency owners, and fellow hobbyists, I would have to say that cross-checking reviews and photos was a pretty good way to have success in this city. We have had our share of shills but so have several other review boards. I think this problem is a bit overstated. One shill was asking for the 20$ discount for member of the Eleganza Club and John flew off the handle at him and reported him to MERB. For the amount of business this guy did with Eleganza, he should have been given a free session or two a year. But the board had a field day with this guy. What I don't like is the guy that was writing fake reviews and then it turns out that he was also the booker for that girl and stood to make money everytime the girl had an appointment.