Here's a web site some teachers might find a good place to stop. This site is set up so that teachers can buy, share or sell projects and lesson plans. So if you have a good lesson plan you created and spent a lot of time and energy creating, you can sell it online to other teachers.
There is also a section of free teacher created resources that is being shared.
Not sure how effective this site is, but it might be worth a few a minutes of your time to check out.