From a thoroughly modern perspective, Sarah Faith Gottesdiener suggests in The Moon Book that they are a good time to cord cut, hex-break, uncross, divine, and delve into shadow work / mirror magick.
I will probably take an uncrossing bath, try out a cord cutting with Hekate and Atropos, try one of @Laurel_Spider’s halloween spreads (tea and tarot style), and consecrate my black mirror.
@Dankquanicus Mars will still be retrograde; is there any form of magick you would avoid doing, from a traditional perspective? That you are open to sharing.