To the right hand side, you'll find some quick links to all the guides that have been posted to the blog. Sometimes I will update the guides on those pages and not the original blog entry, since those will continually get pushed to the end. To find the most current information, find the guide on the right hand side and click that link. At the very bottom there will be a last updated date, that way you always know if something within the guide has changed.
This can be very helpful since each site frequently goes through changes and either adds or removes features. One example is Swagbucks. You used to earn a point for visiting their Trusted Surveys page, since they updated the look of it a month or two ago, you no longer earn that point.
