Writing an article about "how to install Linux" is easy, because the basic installation of just about every Linux distribution I've ever seen is easy: choose your language, keyboard, time zone, choose the disk/partition to install it on, choose your software, set a user ID and password, and you're done. Mostly.
The reality is that there can be more twists to get your system useable the way you want it, especially with Ubuntu, which doesn't include non-free software in the distribution.
The good news is that you can get answers to many of your questions about which software to install (and which to uninstall), how to get some of the cool features in Firefox to work, and how to get some of that non-free but very handy for everyday surfing software to work on your Ubuntu desktop from this article: The Perfect Desktop - Ubuntu 7.10 "Gutsy Gibbon".
If you just look at the first page (of six), you may be disappointed: it's mostly a rehash of screenshots of the install process. But skim it or skip it and you'll get to the good parts, including tips on how to remove software and stop (or start) services, pointers to the good software that doesn't get installed by default but that you probably want, and how to install add-ins to Firefox.
It's all on HowToForge. This article doesn't have anything to say about partitioning, which is a topic that, oddly, doesn't get much treatment in "howto" articles about Linux generally. Here's an article on how to Modify Your Partitions With GParted Without Losing Data, but it doesn't give much guidance on how to make partition decisions.
I'll just have to write an article about partitioning, not just how to do it but why you want to do it. Because I've been looking for close to ten years for that kind of guidance, and have yet to find it.