Displays are always nice. So far I've just been demonstrating how to use 7-segmented displays to display numbers using very few resources. But what if you want to display text? Or pictures? Or both? Well in order to do that, you're going to need a simple LCD screen.
Now there are simple led screens out there right now which work on serial communication and only display text. That might be good enough for you, but I like flexibility. With a GLCD, I can use different fonts, show pictures, and even animations!
What's also really nice is that the GLCD I'm using is only $20. Granted, this is a little bit more involved to program and to get to work above the super easy Serial.print("Hello World") commands.
As always, I made it at TechShop.