I am traveling to europe in late may and early june. There will be three of us. We will be visiting London, Paris, Amsterdam, Berlin, Prague, and possibly Munich. We were wondering some of the things we should see and i was wondering about what's the best way to get between all these cities. Thank You in advance.

For what to see, head to your local library and look at some guide books. That will help you get you started, and you can come back here with specific questions.

You can start by clicking the Destinations link above to get an idea of what each city has to offer. Also, type the city name in the search box and you'll find more information than you need.

How much time do you have?
This is the German rail website - it is helpful in determining the time and frequency of trains.
http://www.reiseauskunft.bahn.de/bin/query.exe/en

This is a good air website to find out which airlines fly between those cities and how much it will cost:
http://www.whichbudget.com

I think if you do a bit of research and then come back with specific questions, using a more specific title, you'll get lots of information from people.

Have a fun trip!

You can travel between cities by train, plane, bus, or rental car.

Hopefully this trip is at least 3-4 weeks since you mention 6 cities you plan to visit?

I would start reading guidebooks from the library and/or travel magazines for ideas of what to do in each place.

With 3 people traveling you could each pick 1 city and plan just that one? Worked well for me travelingn with a friend (he planned Paris, I planned Venice).