Check Craigslist daily for your nearest city (and for all major cities, where off-location opportunities are usually listed). Check the "tv / film / video" section as well as the "crew" and "creative" sections under Gigs.
Step2
Post an ad outlining your services to the Services section of your local Craigslist.
Step3
Join Elastic Lab (http://www.elasticlab.com).
Step4
Join TurnHere (http://www.turnhere.com).
Step5
Join XLNT Ads (http://www.xlntads.com).
Step6
Search MediaMobz (http://www.mediamobz.com).
Step7
Search CreativeCow (http://www.creativecow.net).
Step8
Search Elance (http://www.elance.com).
Step9
Search Guru (http://www.guru.com).
Tips & Warnings
Make sure you create thorough profiles on each site you join, so people looking for someone to hire can get in touch.
A website (or even a YouTube channel) with clips from your portfolio goes a long way towards helping you compete with others for jobs.
Paying filmmaker networks like Elastic Lab are your best bets for paying projects, because they bring projects to you that fit your skills - you don't need to search for the jobs directly.
Canon XL2 Digital Video Camera
Enthusiast 
