How do find your stocks? Check the one of many stock trading boards on the hub for starters. Also, equityfeed has software that scans the markets for movers, you can set the parameters to fit your needs ie: search pinks/otcbb trading between .001 and .05 with at least a 10% gain etc etc. They also have a news feed you can watch for potential trades.
Initially, how does one run across a company they are interested in? Same as above
Do you subscribe to an organization that gives you the heads up or do you run across boards here and find some you want to do your DD on? Same as above
How do you find the early companies? Same as above