The one below is the one that I've made for my lectures, but unfortunately, my artistic talent is pretty much limited to "using a pretty font."
Here's another I use for making hypotheses, with the scenario being a decline in birth rate and a decline in stork population occurring at the same time. Still, this is just using my other artistic talent which equates to "use the other pretty font you like."
Would be wonderful though, if there are some out there that use cool illustrations or just nail it in the visual information department. If you know of any do pass them on in the comments.