With a new Active User feature, Google allows you to track active users on a daily, weekly, 2 weeks and 30 days basis.
If filters and .htaccess file fail this is how you can stop referral spam in Google Analytics.
I found that some one page website owners don't know what to track on their pages. They think if a website doesn't have payment process and a bunch of pages, [...]
I had a problem to follow the activities of contacts after I sent them an email through Outlook. Here you can read my research and see the solutions I found.