Many years ago, I started taking all my 'text-editor-alike' notes, setup up a wiki (dokuwiki plug, but there's definitely others like Mediawiki, ect.) and added a bit of light wiki markup to them equaled instant, half-ass-looking pro-like documentation with an authentication/group control wrapper around it (e.g. local accounts or AD/LDAP tie-in).
I don't know what organization you are in or what you can/cannot setup on a whim --- but that's what I'd do. It's SUPER cool to hear you actually care about documentation and daily note taking, ect., but the step beyond IMHO is a searchable and share-able interface to it.
And even taking documentation with you is a cinch --- I just recently changed jobs and I was able to take 8+ years worth of documentation/notes/you-name-it that wasn't company specific or had a NDA attached to it, tarball it up, set up a new wiki, unpack it and I was done.
At most if you really hate the wiki, just write a few reg-ex commands to mostly strip off your markup business and you're left with what you've started: ASCII text files again.