Microsoft Office 2007 and Ubuntu
You really need Microsoft Office for work but you are not willing to switch to a Microsoft brand operating system? No problem! Office 2007 works like charm with the windows compatible runtime environment Wine. Just follow this tutorial and you can start using MS office, which is still not completely replaceable by open source software, especially if you have to exchange documents with other people using it. For the record: I still prefer Latex, but sometimes one has to bite the bullet, which is actually not that much of a problem.