(Note to Webmaster: sorry if this is considered too blatant a promotion of a commercial service. This is an entirely personal recommendation and I have no financial interest here.)
I remember quite a few of you were as disappointed as I was when Thomas Cook stopped publishing their monthly printed European rail timetable book because it wasn't profitable enough. Online journey planners on rail websites are great for recommending the fastest way from A to B, but they're pretty useless for seeing what other sites are within easy reach of somewhere, or on the way, or what the easiest order to visit several places will be.
The Thomas Cook editors have done a management buy-out, and the new version is now on sale online from http://www.europeanrailtimetable.eu/. The March edition is sold out, but they are taking orders for April.