What's the best way to find a good GC?

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To be perfectly honest, Craigslist has been my primary source for GC's in the past 3 years and it hasn't really been presenting me with major quality options.  Tried using Homeadvisor but the guys there are either too expensive or the affordable guy are too busy.  What is the next best step?  A few people have told me calling around to lumber yards or hanging out at Home Depot at 7am is the best way to solve this problem.  How have fellow LA Investors solved this problem?