My lame strategy is to try beers from those I know that make good beer. I also rely on word of mouth from those I know that say, "Go to both X and try beer Y!". You can't try them all these days.
If you are pouring, and people come to your booth and say "I was told by Z that I have to try this beer, it is a great example", then you are doing it right. If the big names come around and try your beer, and smile and nod, you are doing it right.
Hope this helps.