Since I find myself often writing to correct lots of misperceptions about retrograde planets in general, and Mercury retrogrades in particular, I've decided to assemble all of the links to previous posts on the topic in one blog post, so that I can easily refer to them in the future.
So here they are in (almost) chronological order, and are probably best read in this order.
1. Retrograde Schmetrograde
2. Retrograde Planets
3. Retrograde Planets: What to do?
4. Not Again With This Retrograde Thing! (Not Really, Read On...)
5. Mercury Retrograde - Again
6. Here We Go Again
7. Retrogrades and the supposed "Shadow"
8. Harping on Mercury