More: How to Pick the Right Running Shoes
PROBLEM: "MY SHOE RUBS ONE SPOT ON THE TOP OF MY FOOT." Solution: Eliminate pressure on a "hot spot" by lacing around it, not directly over it.
Place a lipstick smear on your hot spot. Slide your bare foot into your shoe and take it out. The mark on the underside of the tongue tells you which set(s) of eyelets to skip. Lace your shoe until you reach the eyelet before the spot. Take the lace back under and pull it up through the next eyelet on the same side. Take the lace across and continue to lace. Repeat this on the other side. You'll have an empty spot on the tongue where no laces cross it, which should eliminate your pressure point.
PROBLEM: "MY BIG TOENAIL TURNED BLACK."
Solution: Lift the upper material above your big toe up and off it.
Thread one end of the lace through the eyelet next to your big toe. Pull the end of that lace up to the last eyelet on the opposite side, bringing the lace through to the outside. Leave just enough slack at the top to tie a bow. Take the remaining portion of the lace straight across toward the outside of the shoe and then diagonally up toward the inside of the shoe. Repeat until all of the eyelets are laced. When you tug on the outside lace, it will pull the material above your big toe up and off your nail.