Sergi, sat nav, back up small map, puncture repair kit, Euro breakdown, spare key and alarm blip, credit card, a change of underwear, water, bike documents and your shades.
Stay in a F1 hotel one the way down as they are mega cheap and clean. Troyes or Dijon are good stopovers for the first day. Take the N71 from Troyes to Dijon and take the N5 from Dijon to Geneva. I stopped in Annecy, very pituresque with loads of restaurants and bars. We used it as a base and travelled all over from there :thumbup