This is really easy! All you have to do is get a journal or even any type of notebook and start writing with either a pen, a pencil, or even paint! I love this idea because it's just a way to think back on your life think is important.
On the theme of decorated notebooks. what about a travel journal to give to a travel-loving friend? (something to write notes in, glue in maps before hand, etc) or a prayer/hope/wish journal, recipe (Diy Photo Art)