EnglishPage.com has plenty of lessons planned out to choose from, and have a weekly lesson, so if you don't have anything specific you are looking for, you can still get some ideas. Lessons include verb tenses, modals, prepositions, vocab, and more.
At EverythingESL.com you can find lesson plans, other resources, and teaching tips.
ITESLJ.org has this page of hundreds of lesson plans for anything from writing and reading all the way to culture and conversation. This is a very large resource.
Boggle's World lesson plan archives.
About.com provides several resources for reading lesson plans.
Reading lesson plans for all topics and ages.