If you are flying the North Atlantic pick up ICAO's On The Right Track, I believe you can order it for $7. It covers NAT pretty well and will give you some good background. Also, if you can get your hands on the Jepp high altitude chart for the North Atlantic it has a large procedures section you can review. As far as planning goes some people "self-handle" depending on the country and other use Universal or Jepp. Either way it can be difficult at best.