Tried, liked
German Mirror. I now look where my mirror usually is even when walking to look behind me

Phil Hand Cleaner. After using soap for my whole life to try and get grease off, I'm never going to be without this stuff again!

Barcons. Friction is pretty neat

Magicshine MJ-818 + taillight. Feel so much safer on my night commute now, can see so much more than I did before, and got home during a heavy snowstorm on main roads. 100% reliable for me with the new battery pack (waterproof one with LCD)

Winter Commuting: had a couple commutes in the snow (one at night when the roads weren't plowed with 23mm road tires) and loved it. wasn't as dangerous as people made it out to be, but had to be in first gear the whole time.

Tried, not liked:
Blaze 1W light. After having my MS, I wonder how I survived with it.

Wax lube: after fighting with it, I'm going to buy a new chain and use Chain-L No5 for probably the rest of my life.