I do the most obvious-- cut it across the grain of the plug so I am getting layers of all of the blend's tobaccos, then take the slices and any loose debris and rub it down to size, let it dry anywhere from two hours to a day, and pack the pipe. Some time when I'm not yearning for a smoke, I might try the slice and fold method, or the smoke in chunks method, but I'm not always patient enough for trial and error. Some blends that come cut in cubes don't burn well, which puts me off lighting up more solid pieces of tobacco, though I'm sure I could get the hang of them.