Agile methods are not really methods...
There are more a spirit. The main is a focus on :
communication
reactivity to changes
customers orientation
This can be achieved in lot of ways, and it's more important to find your way to do it. If you want an example of what this spirit can be, you can read the free 37signals' online book, Getting Real.
But there are some steps you can start with
They are no big rules you must enforce, but you can try the following and see how it goes with you team :
Quick stands up meetings. 5-15 minutes daily meeting where everybody stays up on his feet and explain what he has accomplished, what need to be done and what can prevent him from doing it. Keep it under 15 minutes, with the minimum number of people.
Set simple goals for short term deadlines instead of big goals in weeks.
Build small team (3 persons) and divide the work between them. Put them in the same room and ensure they have at least half a day to work without ANY interruption.
Set many little regular review with your customer. Don't write specs. Sketch, design, prototype, show to the customer, fix/adapt/change then build. Then do it again.
Testing, versioning, bug tracking are tools, not methods. No one cares how you do it and with what software are long as you do it. They are not the issue.
