Craigslist.org is an enormous - and growing - online classifieds ad network. At this point, it is hundreds of sites by city and/or state in the U.S., for several cities in Canada, and by country or city outside the U.S. and Canada. There are apartments for rent, things for sale, and - happily - jobs and "gigs."
Note: Most of the listings are free, so there is some abuse by inept people and low life types. Just ignore the irrelevant, too-good-to-be-true, and clueless listings.
Finding the "Right" Craigslist
To find the Craig's List for your state or town, or where you want to live, go to Craig's List - http://www.craigslist.org and pick the appropriate location. The locations are listed in the columns on the right side of every Craig's List home page. Just click on the appropriate location link from those listed. The new home page will look like the one you just left except there should be a different name in the heading at the top of the page. If you pick a state with several local Craig's Lists, you will get a page that offers you a choice of towns and cities in that state.
Understanding Craigslist
The listings are organized by category, in reverse chronological order which means that the newest ones are at the top, with yesterday's next, and so on to the oldest at the end. So you can pick a category and/or a sub-category to see the listings. Again, listings may be mis-categorized, so focus on a sub-category can be a mistake if something you want is listed in a sub-category you don't expect (more below).
Finding the Jobs (and Gigs) in the "jobs" column
Near the top center of the home page, you'll find this column heading - jobs - the number in parenthesis following the word indicates how many listings there are.
I'd recommend just browsing through the job postings by clicking on the word "jobs" and scrolling down to see what was posted today (so far), yesterday, the day before yesterday, etc. as far back as you want to go. I like to browse through everything in Jobs so that I don't miss something that is in an unexpected category.
Below the Jobs on the home page are the "gigs" - the number in parenthesis, again, is a count of the number of listings available. "Gigs" are mostly short-term jobs, also organized into sub-categories and reverse chronological order. Browsing through the gigs is usually very interesting in most locations. Sometimes you can end up with a permanent job starting out with a "gig;" sometimes you'll just make enough money to cover your bills until you get a "real job;" and sometimes you're just adding experience to your resume (and maybe a skill or two, too).
Searching in Craigslist
You can also search through the postings using the usual key words when you are on the "jobs" and "gigs" category main pages. If you type your query into the search bar on the Craig's List home page, it will search through everything, not just the jobs, and so it probably won't be very useful.
Subscribing to Craigslist Updates
They also provide an e-mail service when new postings appear. Click on "subscriptions" near the bottom of the left most column of the home page, and sign up.
Caution!
Craig's List offers you the option of posting your resume in the "resumes" section below the "gigs" in the "jobs" column. Don't do it, unless you protect your identity! See Job-Hunt.org's CyberSafe Resume section before you make your resume public!