You never know when you may need to sharpen an axe... and who better to learn from than the Boy Scouts? Brace the axe head on the ground between a log about 6" in diameter and two woooden pegs or tent stakes. Sharpen your axe with an 8-10 inch mill bastard file. Be sure to wear leather gloves. Make a knuckle guard out of leather, plywood, or an old inner tube. Place the file on the edge of the blade and push it into the bit. Lift the file as you draw back for each stroke. Turn the axe around the sharpen the other side.
Click on Knife Sharpening to learn how to sharpen a knife.
Sharpen your knife with a whetstone. Some experts put water or light oil on their whetstone. The choice depends on the kind of stone and personal preference.