best ways to get around?

I am planning a 2 week trip starting in Krakow, Poland sometime next year. I really would like to start there, but move around during the 2 weeks. What are the best ways to travel with cost and time as large factors.

most modes of transport are slow in Eastern European countries, you'd have to look at trains and buses it all depends on where you are going which is best way. As for costs it's very cheap which ever method you use.