Paris draws million of people each year for various reasons. Fashion, Louvre, Seine river, Eiffel, or simply being in Paris, are some to mention. There are so much to write about Paris; after all none will be bored with Paris for a week – not to mention if you only have a few days to spend in Paris.
The key to visiting Paris in such short time is to know what to visit, how to get there and be sure that you don’t miss important places. Having planned those, always – really always – make sure you see Paris from the eyes of Parisians. Parisians don’t live in Louvre, not climb Eiffel every day. There is much more in Paris than monuments and musems, there are the people. Make sure to include them in your trip.
Paris is easily reached. Either you fly in directly to Paris, which should be considered even when you don’t plan to return from Paris (round trip is not necessary cheaper), or take Thalys, or Eurolines. Consider the no-frill airlines such as RyanAir and Easyjet that fly to (smaller) airports in Paris for substantially much cheaper price. Take Thalys if time is critical. For boot-strapping, do Eurolines – there is no cheaper transportation mean that Eurolines, for exception of hitchiking, which I don’t recommend.
