You've got some good answers already, I just have a couple of notes to add.
In the U.S. (probably everywhere), networking is absolutely the best way to get a job. Hands down. No question. So make sure that your family and friends know you are looking for a job as a photo retoucher.
Go to local photo club meetings, if there are any (do a Yahoo search), Web developer groups, or other group of potential co-enthusiasts or clients. Meet people. Once a year doesn't work - be an active member. Volunteer. The best job to have is checking people in for meetings - gives you a no pressure way to meet everyone who attends.
* Craigslist.org - http://www.craigslist.org
As mentioned, Craigslist can be very effective. It's a giant online classifieds site, organized by location, with the opportunity to post a resume, which you can do in HTML to include the links mentioned above. 2 problems with Craigslist (both manageable):
1.) Privacy - even in a job hunt you want to protect your privacy (identity). So identify yourself only with an "anonymous" type e-mail address (like @yahoo.com or @msn.com, etc.) and an unlisted phone number like, hopefully, your cell phone. Google your phone number to see if it's unlisted. If it's not, don't use it.
2.) Re-posting - you'll need to keep reposting your resume because Craigslist operates like a newsgroup - newest listings at the top, oldest at the bottom. They seem to drop off the bottom in about 30 days, so just repost every 30 days to stay in the search results.
* Indeed.com - http://www.indeed.com
Indeed is a job aggregator, collecting job postings off the giant sites (Monster, HotJobs, CareerBuilder), the niche sites and other small sites, and employer sites.
I just did a quick Indeed search on "photo retouching" (with the quotes), and Indeed found 91 results (which is very low for Indeed). However, the employers included Time Warner, Aquent, and AOL!