Many choose to go 'interailing' - picking up a train pass unique to Europeans allowing unlimited travel between up to 30 countries. It's the most convenient and time-efficient method of destination hopping.
A more select number choose the more difficult and costly (but potentially more rewarding) path with a road trip. And it's the latter that I'd been itching to attempt for years, and when my flatmate Sam persuaded me to go travelling it was at the top of the agenda.