maybe this is nothing new but anyways what I did was I signed up for an account on ifttt.com and then I went under my username it says "create" then click on the big letters that say "THIS" on the search bar just type "craigslist" then click on it then it will give you a box where you can put a link...
for that go on craiglist on your area, and go under all gigs and type a keyword.. for example I typed logo then I hit search..
once you do that copy the link on the address bar and paste it back on ifttt.com
once you do that click on the big letter that say "THAT"
now what you do is type the words "Gmail" and click on it when you find it, and the click on send an email
this is the final step. all you do now is input the email that you want the notifications sent to, and then hit create.
now every time someone post an ad on that specific location with the keywords "Logo" on it you will get an email notifications with the link to that ad, which of course you can reply to and try to get that sale.
I was doing logos, graphic designs etc. I would get a bunch of emails all day long because I had done this with a few cities around my area. my best week I made $435 and the worst one I had was $190 but that was because I was lazy to reply to those emails..
warning it does get annoying if you do this with a few cities, and depending on the keywords that you use you will get a bunch of emails..
but if you think outside the box you can make good money doing this. I hope I didn't confuse anyone I felt like I didn't do a very good job explaining, if you have any questions feel free to ask.
I stopped applying this technique because I have been focusing a little more on getting my business started and so far in the last week and half I have gotten a few offline clients. since I am having better success with that I stopped but I think I will get back to doing this. an extra $400 doesn't hurt anyone, specially since I wasn't doing none of the work.