Students love to talk about what's going on right now, and you can use that interest to motivate your students to do their best in class with these strategies. There's a "Need Help Getting Started?" section with some great ideas.
Simply stated, these ten motivational strategies you may or may not be using in your classes are explained and either debunked or improved upon including ways to use them with your students to be most effective.
This is a pretty comprehensive look at motivating students to learn and to be better students. It includes quite a lot of information and activities. You should be able to find some ideas to use in your lessons.
If you are interested in some of the research behind student disengagement and motivational factors, then you need to read this article. It also explains how extrinsic motivators might work better when initiated appropriately.