These are some websites which are great for planning or general inspiration:
Breathe with me – A UK based project which aims to support the Cystic Fibrosis Trust
Alastair Humphreys – An adventurer, author and motivational speaker who cycled around the world.
That Emily Chappell – A cycle courier who is cycling around the world, blogging awesomely as she goes.
Ross Methven – City slicker turned passionate cyclist, this blog documents Ross’s trip from Edinburgh to Cape Town.
Great Big Scary World – Website of Jamie Bowlby-Whiting, an adventurer who thinks that anyone can have an adventure.
London Cyclist – Website run by a London bike enthusiast. Great for picking up tips and getting your cycle geek on.
Bored Panda – Randomness from around the world.