when you have finished cooking with your pot or metal mug place it on a mat of twigs or grass, this will give it insulation and prevent it from cooling too quickly!
when cooking on open fires the pots always get black, i have two tips for this.
1. black soaks up heat so theoretically the pot should get hotter quicker!
by all means wash inside the pot but not washing the outside can be an advantage!
2. put a thin coat of washing up liquid on the base of the pot before you cook in it this will help the soot come off more quickly!
its always worth having some thick gloves or cloth handy to move hot pots about!