Do word association where you take words and draw associations between them.
rectangle - green
How many associations can you make between
those two words?
Internet etc etc etc etc
Be an Artist
I do not mean for you to be a Picasso or a one of the
Grand Masters, but just a scribbler. The aim is to use
your brain in a way it is not used to and thus to
develop your whole brain.
You can do drawings freehand or use a computer and use some basic art forms like these above. So starts scribbling!
And there, New Picasso, you have a fish and an eye and your brain is in top gear!