Integrating online tools for learning into your lessons

Contemporary Learners increasing live in an online world and they are connected in so many ways. The downside for teachers is that many of the great lessons we plan are deemed 'boring' after what seems like an increasingly shorter and shorter time. So lets re-engage our students online!

"The term Web 2.0 is associated with web applications that facilitate participatory information sharing, interoperability, user-centered design and collaboration on the World Wide Web. A Web 2.0 site allows users to interact and collaborate with each other in a social media dialogue as creators (prosumers) of user-generated content in a virtual community, in contrast to websites where users (consumers) are limited to the passive viewing of content that was created for them."
Pasted from <http://en.wikipedia.org/wiki/Web_2.0>

How can you use these web 2.0 tools in your next lesson to re-engage your students and achieve the learning objectives you have planned for?