I have a white full-face helmet to make myself more easily seen by motorists. I also have a hi-viz mesh jacket (BMW Airshell) and an assortment of vests in hi-viz yellow that I probably should wear more often. I will put on a hi-viz vest if there is any chance of fog, if I am on a serious road trip, or if I will or might go through road construction work zones.

It's not enough to complain about left-turners and then not doing something about it.