Take a look at my well thought out and easy to use dust Collection system and get some great ideas for your own workshop.
Links:

Dust collection boom:
   • Shop Made Festool Dust Collector Boom  

One good Two stage conversion video(there are tons):
   • 2 Stage Harbor Freight Dust Collector  

another
   • Installing my Modifed Harbor Freight ...  


blast gate build video(again one of many videos out there):
   • Simple, Cheap Blast Gates *Free Plans...