When you move from one place to another you need to find out where your local stores are (Tesco’s, Sainburies etc) also it is the same when you move from one operating system to another.
I am going to add to this list where ever possible, the first is the windows application and the second is the Linux equivalent that I use.
|Media player (MP3)
|Media player (MP3 / Videos)
|Office applications (Word, Spread sheets etc)
There is a couple of applications in there that also can be used within Windows Operating System as well, so you can try out open source applications without moving operating system to find out if you are able to use that application before moving over to Linux.