Let's assume you have a calculator, so we can forego the Math 101 lessons. When the rally master gives you the route book, you start to crunch the numbers. If you are quick at doing calculations, you will want to do all the references in the route book. Yes every instruction! I know it's a lot, but the more you do, the better your result will be. If the route master has given you a route book with both kilometre and mileage distances - cross out the ones you will not be using. Driving with an odometer calibrated in km, to route instructions given in miles, will not lead to a victorious end to the day. When you start calculating, just work out times for the speed change instructions. At the end of each regularity, your arrival time should match your start time for the transit that follows (to the second). Usually, there are only between five and 20 speed change instructions. Getting those done first is like being on Millionaire and getting to the $32K mark. It's money in the bank. If you are making a mistake in the way you calculate (or the route master has made a mistake in the book) this is the quickest way to find it and creates a lot less work to have to do over.   Depending on how well you are getting through the route calculations, do all the speed changes for all regularities, or do enough to take you to a break in the schedule. Then go back to fill in the blanks. The key thing is to have a target time for every instruction before you start each regularity. Most instructions are just a short distance apart.     >>> page 3 | page 2 | <<< page 1