Jeff Cohn, the founder and CEO of Syndicated Maps (www.syndicatedmaps.com) previously helped start up the Tech Coast Angels' efforts and company screenings in Los Angeles. He gives other entrepreneurs advice about making a startup successful, and what he's learned over the years of bootstrapping his own startup. Syndicated Maps runs such sites as Dead Cell Zones, a crowdsourced map of dead cell zones; PhotoEnforced.com, a map and database of traffic camera locations, and DrillingMaps.com, a directory of oil drilling locations.