I bought a few grippers in the past from London Kettlebells, basically the representatives of Ironmind in the UK, and they just sent me a grip training article which looks pretty comprehensive.

It looks like a summary of Mastery of Hand Strenght by John Brookfield. Mastery is the reference for grip workouts by the way.

Enjoy

http://www.londonkettlebells.com/downloads

BTW I think this article should be 'stickied'. It is a good general reference on grip work.

It could be part of a longer sticky that would refer quality articles/advice on MA training.

buy some grippers or do some farmers walks

could this be uploaded by someone?