I've always kept a journal. 
Usually several at a time. 
I still do. 
 Every page is decorated.

All of my watercolors are found within the pages of the journals.
I have a LOT of journals, and a LOT of watercolors!
Thousands of "decorated pages", sketches, and adventures.
I scan the art, and put the watercolors up on Flickr.
Much easier to view!

Right here:

Some of the hundreds of journal covers over the years. 

Since I enjoy seeing other people's journal pages so much, I want to put the "best" pages into a book. 
Eventually. It's been on my mind for years. 
A wonderful project for a rainy day.