I do exactly that as a job, I teach modern development techniques to established software shops. The way I present it, is to teach good development habits by using good development tools.

1. Before anything start with version control and how to use it effectively. With out this step you got nothing.

2. Collaboration. Choose a project management tool (Jira or the like) and show them how to use it effectively. Show them how developers use it to keep PHB & managers honest.

3. Continuous Integration. Choose a CI of your choice, set it up, get it working for them, get them addicted to the time/work savings. (I use Jenkins, but now there are better ones)

4. Testing. Teach them why testing is good, help them implementing the testing framework (On the CI) and help institute it as a 1st level part of the development process.

My style, is to never give them "more work", but to show them how each step saves them work and time.

Regards