Start with searching for jobs on job search engines. Most of these sites provide RSS feeds and email alerts for your job search. Use them.

Indeed http://Indeed.com
Oddle http://oodle.com
Simplyhired http://simplyhired.com

Craigslist http://craigslist.org

Journalism Jobs http://journalismJobs.com

Mediaishiring http://twitter.com/mediaishiring
Mediabistro Jobs http://www.mediabistro.com/joblistings/
Berkeley Journalism Jobboard http://journalism.berkeley.edu/jobs/
ACES [The American Copy Editors Society] Job Board. http://groups.yahoo.com/group/ACESjobs/
Copy Editor Job Board. http://jobs.copyeditor.com/c/search_results.cfm?site_id=502
Ed 2010 Whisper Jobs. http://www.ed2010.com/jobs/whisperjobs
Gorkana Alerts http://www2.gorkanapr.com/jobs/journalist
IRE Job Center http://www.ire.org/jobs/
Journalism Next http://www.journalismnext.com/search_result.cfm?categoryid=0
Lost Remote Digital Media Jobs http://jobs.lostremote.com/
Magazine Publishers of America http://jobs.magazine.org/search/results/
Jade Walker’s NYCWriters group http://groups.yahoo.com/group/NYCWriters/
Poynter Online http://careers.poynter.org/search/results/
RTNDA Job Postings https://map.rtnda.org/careercenter/CC58SearchForJobs.aspx

Tip: Don't limite yourself to seraching for journalism jobs. Expand your horizons. Also search for - blogging jobs, community manager jobs, editing jobs, freelance jobs, technical writer jobs...