Not a specific command, but I learned recently you can just dump any executable script into ~/bin and run it from the terminal.
I suffer greatly from analysis paralysis, I have a very hard time making decisions especially if there's many options. So I wrote a script that reads a text file full of tasks and just picks one. It took me like ten minutes to write and now I spend far more time doing stuff instead of doing nothing and feeling badly that I can't decide what to do.
This is because $HOME/bin is in your $PATH environment variable. You can add more paths that you'd like to execute scripts from, like a personal git repo that contains your scripts.