Flexitime.
The Bull Rhino and multiple flexi tubs are a perfect combination for versatility and ease of use.
Eurail Pass Saver Flexi: For two or more people together, travel first class for 10 or 15 consecutive days within a 2 month period.
Eurail Pass Youth Flexi: Same as above but offers 10 or 15 day travel within a 2 month time period.
Tour operators, such as Pacific Delight Tours, Affordable Tours, and Orient Flexi Pax, among others offer a variety of such packages.