Re: How to make Ubuntu faster?
Meh, there's nothing you need to do. If you are low on disk space you might want to 'sudo rm /var/cache/apt/archives/*' every now and then - it removes all the cached package files that you have downloaded for new software or for updates. Once they've been installed you don't really need them for anything.
Other than that, just enjoy the fact that your computer is not making more work for you!
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.