Cut the top five inches or so off of an old pair of thick sox so you have two tubes. Throw the bottoms away.
When you want to start a scent trail, put the tubes over the front half of your boots. Pour a bit of the scent of your choice on any non-porous surface (a piece of plastic from a grocery bag works well, step on the scent, and start walking.
For scent, get yourself a box of those little Glad "snack bags". Collect the hocks and urine from any deer you or your friends kill. Put one or two hocks and an ounce or two of urine in a snack bag and store in a freezer. Grab one whenever you plan to use scent.
I use a scent line for the last 200 yard walk to my stand just about every hunt.