Extra lights.

[Pearson72]

I also have two sets on the front and rear. I brought a set of knog's which are very bright and cheep! To go with my expensive set.

 

[downfader]

In addition to a set of battery lights, I have some Reelight, 'always on' flashers, that I bought in a fit of gizmo lust.

The set I have, the rear light mounts on the near side of the bike, but I believe they now produce an offside version too.

They look pretty cool, must see if they are on youtube

 

[Maz]

I pick out a cyclist at a distance much more easily when they're in reflective hi-vis gear.

Fantastically wide berth I was given today wearing the POLITE hiviz ...esp. on the dual-carriageway. Heck, a few of 'em even indicated after pulling in after the overtakes!