This isn't new, but I don't think it's been mentioned here before.
It's a guide done for Cycling Scotland by CycleStreets and is very useful as a straightforward introduction to OSM mapping - which is what CycleStreets relies on route/journey planning.
http://cyclingscotland.msol.org.uk/Uploads/1345461948_1964231507_CommunityMappingHandbook.pdf