You need to take the proper stunts to really take advantage of Pewter Dragging or Healing. For Dragging you can take the Slow-Burning stunt up to twice - each time you take it you double the length of time that a Pewter charge lasts for you, from 5 to 10 minutes, then from 10 to 20 minutes per charge. This takes long Pewter Drags from the realm of the the impossible to the merely annoying. For Healing you need to take the Unconscious Burning stunt - if you're sleeping and also injured, you can burn Pewter at a rate of 1 charge every 3 hours. This only gives you the increased healing effect and ends as soon as you wake up.
Hope this helps!