The trick is to put the pan in a cold oven, then switch it on &amp; begin your timer.  Cover cookie sheet with tinfoil first. Bake at 375 for about 18-20 min instead of 400 for ten because the lower and slower the more fat renders out. Watch closely the last couple minutes. If you put the bacon on a rack it will get more crispy &amp; all the fat drains off.  Cook the whole box &amp; then keep it in frig, microwave to heat up.