2) Use this number generator and put in your max icon number, then correspond that number to an icon so that you're randomly choosing that icon (or just close your eyes and poke your screen to choose, I'm not picky).
3) Make a blank tag with that icon, this sets the stage for others to tag you.
4) Create a scene based on your icon. Serious, silly, dialogue or more, up to you.
Do as many as you'd like with all or some of your characters and reply to as many as you like. Have fun!