Passionate Pixel Pushing
Excerpt from the site:
Some helpful stencils for designing your database and models. Sort of an Entity Relationship Diagram (ERD) with some added stuff that helps me think through what’s going to go on when I get to coding.
Don’t feel bad if (like me) you are more of a Designer/Developer and just use the plain arrow to connect things. The ERD stuff can make your head explode if you go too deep.
In case you’re new to these kinds of things, you can add more name/type rows to the tables by clicking in a row and hitting Cmd-Enter (or menu Edit -> Tables -> Insert Row). That one was not so obvious to me initially either.