Are you familiar with Inktober? It is a month long challenge started by Jake Parker designed to instill in artists a daily, ink-drawing habit. You can read all about it (and get the list for this year) from the Inktober website.
There is also a tangled version of Inktober. The list of prompts for that are here.
I’m starting a new Journal Junkies Art Journal on October 1, so I’ve cheated a bit and added in my calendar and a few other pages already.