I love blog posts that show features of a product that I use frequently that I didn’t know existed.  Excel@Work has a great blog post “Do you know these Excel 2007 Productivity Secrets (Hint: Coffee is not one of them)”.  In that post, I found out how to see the items on the clipboard (knew this was there somewhere, never knew how to get to it), and how to lock a feature that you might use many times in a row and don’t want to have to keep clicking the button (like format painting). 

Great post, check it out.