I saw bright white flashlights(not the yellow light bulbs). And Peroxide. I've used the tracking lights and honestly, a super bright white light with many LEDs is much better for tracking than one of those tracking lights.

Toilet paper. I usually carry a 1/4 roll of toilet paper in my pack. It serves a dual purpose. The 1st one is given. The second one is for tracking. I use small pieces of it for tracking. You can hang it on a tree or put a small piece next to your last blood. White stands out very good in the woods. I mostly use this for hard tracks. It's great for when you have to back track or you have to spread out in case the deer switched directions all of the sudden. I'm not sure if I would do this on public land as it may be considered littering, but after a few dewey mornings or a good rain, the stuff shrivels up, disappears and will degrade rather quickly.

This is a great post with great information.