Abilty to tag

There needs to be another way to categorize items across all types "notes, lists, contacts" into the same category. Basically a "tag" system would work or "folders". For example. I have a project entitled "The Great Escape" and I may have notes about "Ideas on how to escape" and a shopping list of things I need to buy in order to escape as well as a list of contacts I would like to escape with. I would like to be able to click one button or two and get a list of across all types of reqall items and see all things related to "The Great Escape"