If you're planning a trip to Paris, you likely already have some idea of the things you want to see and do - maybe you already have the quintessential Paris activities written up in a 'must see/do' list. However, unless you know the city well, it is unlikely that you've thought about where these landmarks are, how you get to them, where you should stay, where to avoid and, maybe most importantly, what Paris has to offer other than these postcard-perfect points of interest.
Understanding the Paris Districts (and How to Read them on the Map)
When looking at a general map of the city, you will likely see the arrondissements labeled as 'Arr' (e.g. 5th Arr.) or 'e' (e.g. 5e). It may also be useful to have to hand a map that clearly defines the Paris districts and their boarders; if you look at such a map of the Paris districts, you can see that the numbers of the arrondissements are organized so that the lower numbers show the more central districts (which hold most, but not all, of the most famous attractions) while the higher numbers are used for the outer areas. Of course, you should also be familiar with the Paris districts' names, which are more likely to be used in conversation, and also be aware that some arrondissements share names (if one neighborhood spreads into both districts) or are known by the name of more than one sub-neighborhood within it - these things are never so clear cut!