Some pictures here and there won't hurt anyone but I want to begin with generalities. For example, on Wednesday, SNCF (French railway) starts the ticket sale for January 9th to March 29th. I could write a little about that and add a few examples, maybe even suggestions for lower prices.

The train system that I know best is the one in Austria, where I live, and I can provide tips for reducing the prices, routes, etc. Then, the ones I use most, outside of Austria, are from Italy and France.