As a homebrew user I absolutely abhor having to keep around a list of instructions that I've only barely just caught during an install .. things like:

    launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.rethinkdb.plist
    launchctl load ~/Library/LaunchAgents/homebrew.mxcl.rethinkdb.plist

    cassandra

    To have launchd start cassandra at login:
    ln -sfv /usr/local/opt/cassandra/*.plist ~/Library/LaunchAgents
    Then to load cassandra now:
    launchctl load ~/Library/LaunchAgents/homebrew.mxcl.cassandra.plist


    To have launchd start redis at login:
    ln -sfv /usr/local/opt/redis/*.plist ~/Library/LaunchAgents
    Then to load redis now:
    launchctl load ~/Library/LaunchAgents/homebrew.mxcl.redis.plist
    Or, if you don't want/need launchctl, you can just run:
    redis-server /usr/local/etc/redis.conf

.. and so on and on it goes .. seems like the more things 'improve', the more they stay the same.