If you want to plan a trip to Amsterdam, first of all, take a look on Amsterdam map:
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You will never be able to see everything in one trip, so decide where to go and what to see. Get help from Wikipedia or any other source of information you could find on the internet.
Search for the phrase "what to visit in Amsterdam" and you'll find some common sightseeing places in Amsterdam.
Decide which of them you want to visit and go to Voyajo's website to start planning the route of your trip.
When you're done, share your Amsterdam trip with other members of Voyajo community or with your friends on Facebook.