The marks it makes in the trail are easily recognizable. If you can't follow your own tracks, you should at least be able to follow your stick marks. Even light rains will leave behind the small pits left by a stick. They distribute the effort of walking to other parts of your body, and they can be used for digging, investigating snaky places, pushing brush out of the way, and a myriad of other things. Learn to use a walking stick.
Lizards are pretty good food.
They taste like chicken. Actually everything tastes like chicken when you're hungry. The problem is that most lizards are small and it takes a lot of them to make a difference in your survival chances. Usually it takes more energy to catch them than they are worth. If you decide that lizards are worth the effort, the best time to catch them is in the early morning when the night chill makes them slow and the sun hasn't had a chance to warm them.