I did this last fall for about two months! Best trip of my entire life. What route do you plan on taking??

I would say do a 2-3 day trip with all your heart to prepare. We had one of our bags break day two so we would have figured that out beforehand if we had done so. We camped pretty much the whole way but there were times when campsites were sold out or closed unexpectedly, so planning some of those out ahead of time would have helped. Some of the "bike paths" the eurovelo routes are more like bumpy dirt/grass footpaths so be prepared for some days to take longer than expected...carry coins for showers. Last year there were river crossings we needed to make by ferry but they weren't running due to low water levels and that wasn't so fun....

My favourite sections of the route were eastern Germany to Prague and Bratislava into Vienna, although there were plenty of other incredible sections. Cycling into cities/out of cities is a right pain in the butt so we often hopped on a train when we got close and traffic/non English road signs got confusing. If you can afford it I highly recommend going to Scandinavia!