A few links to sites I find useful:
Sustrans – A fantastic resource for cycle routes and dedicated cycle paths in the UK
Wales Coastal Path – The home page for the Welsh coastal path containing great downloadable maps for the entire route
Trailfinders – Not necessarily the cheapest place but the service is amazing and was essential help when booking the bike as luggage
Japan Cycling Navigator – A great website with route suggestions and an amazing and active Facebook community of cycle tourists posting pictures during trips and helpful tips for routes, places to camp and general advice for rookies like myself. This community has been a massive help!
K Cycles – My Local bike shop, everyone should have a great local bike shop and I am very lucky to have these guys down the road.