The roadmap seems quite simple:
2013 – The astronaut selection begins. A total of 40 people will be chosen to live and train in a replica of the Martian settlement.
2014 – This is where the preparation for sending the first batch of supplies and communication satellite begins.
2016 – In January the supplies, 2500 kg of food and the satellite will be send to Mars.
2018 – A rover will land on Mars. It will choose the best location for the settlement and will stream live video to Earth available for anyone to watch.
2021 – All supplies for the settlement will have landed on Mars plus a second rover.
2022 – All the machinery needed for water, oxygen and atmosphere production will be ready. The first manned flight to Mars launches on September 14. Four people will take the one-way trip to the red planet.
2023 – The first people will land on Mars and start working on the settlement. Two years later the next colonizers will arrive, bringing new modules, rover and hardware.
Mars One - the first plan for a human settlement on Mars - GSMArena Blog