As you view a contact, there should be a button to Create New and a drop-down for other objects so that when you create a new whatever, it's automatically linked to the contact.
This would be most helpful for tasks to call a contact so that you don't have to create a task and backlink it to the contact.
I imagine it would be helpful to have an any-to-any object connection, such as if you are viewing a document (say a PDF of an upcoming event) and you could easily Create New>Event that would be linked to the document.