Here are some posts that people have been reading a lot on my blog in 2012:
For me it is interesting to see that almost none of these posts were written in 2012, and that pretty much all of them are about technical PowerPoint software skills (there is a correlation here, as my posts have evolved a bit over the years). Presumably this is the result of people Googling when they are stuck in PowerPoint. 

Anyway, hopefully these posts are useful if you missed them the first time around.