Correct way to install Mercurial on Ubuntu

I am kind of new to both, Mercurial and Ubuntu. I seem to have awkwardly installed a few other software packages already, so I wanted to see how others would go about doing this. Should I use the apt-get command? If so, how would I use it in this case? Where is the best place to install Mercurial on my file system, and how do I make it part of my shell (I am thinking svn-ish) so I can properly check things in and update? Thanks, Alex