Europe, Summer '09

Hey everyone, My name is Mike and I plan on traveling with one other person to Europe this summer. I have never been to Europe before and I have a somewhat limited budget. Below I have listed the dates and destinations we plan to travel. Any input, tips, or just general info would be greatly appreciated!

May 20 - Depart from NY
May 21 - Arrive in Ibiza, Spain

May 27 - Travel to Madrid, Spain

June 1 - Travel to Venice by plane

June 4 - Travel to Florence by Rail

June 10 - Travel to Rome by Rail

June 16 - Travel to Athens by plane

June 19 - Travel to Mykonos by plane

June 25 - Travel back to New York