I use clicker for all the dogs that come through my doors, from 6 weeks to 16 years!! It's fab, quick and easy for the dogs to understand (humans on the other hand take abit longer to get themselves organised to click on time!!).

I'd recommend joining a class, it can be a very easy training tool, but if you want to take it further get the basic's from a class and then tailor it to your own needs. For example my evil Witch dog is taught high level clicker because she needs something to concentrate on if her evil side comes out to play, but my boys have very basic level training (sit, down, stay etc) because they don't really need to know how to touch a stick etc!!

As Polimba say's it's positive training at it's best so it's worth a try. Classes are usually no more than £4 a session so try one and see...you'll be amazed what can be achieved within a short time.