My background is in direct mail, an industry where best practices seem to be written in stone. It's much easier to be innovative in online media, but the price? You have to develop a system for keeping up with the changing landscape. 

Hubspot.com is full of free resources. This LinkedIn service they've pointed out is free, as well. 

Hubspot: Mastering LinkedIn, 2011-Aug-23, by Pamela Vaughan

Be identifiable. Find out who's checking out your profile by allowing others to see who you are if you view theirs. When you click the information under "Who's Viewed My Profile" on your profile page, you'll be able to view users who have looked at your profile, stats on your profile's number of views, and its appearances in search recently. To change this, go into your settings and click "See what others see when you've viewed their profile."