I have good lights front and back and, now, a little helmet light as country roads are dark. I have my Boardman reflective (space turnip) jacket, which I can wear as a gilet or jacket. It’s well vented so not too boil-in-the-bag. I take spare lights too. Small flasher on the front, couple of small flashers on the rear as well as my usual light. The heels of my winter boots are reflective as are bits on my gloves.
I need a new lid and was thinking of one of the PX reflect ones.