Anything Mercurial that begins with "re-" is favorable during a retrograde. That includes returning to an old issue and revisiting previous conversations. Wait until a few days after the retrograde begins if you can, so Mercury is moving, and consider doing some planetary charity to Mercury -- 8 donations of $8 (or a multiple thereof) made in the hour of Mercury on a Wednesday to a charity that teaches children to read, or to your local library, would be good options.