[kristjan]

Certainly everything in moderation - I only give letters to commands I literally type hundreds of times daily. Over the past 10 years, I've accumulated 5:

    b=`bundle exec`, though this is becoming less often used and I may remove it
    d=dotenv to easily wrap a command in environment variables 
        (https://github.com/bkeepers/dotenv)
    g=git
    h=hub (GitHub's extensions to Git)
    j=autojump to move to common directories using just a few characters
        from their name (https://github.com/wting/autojump)