I've been spending my creative time since the 7DRL putting together talkie projects (see my Super Hero RL fantasy project, for starters), but I'm also about halfway through my first novel.
There are a couple of things I've discovered about creative projects in general.
The biggest one is that there is no limit to creativity. You can't really use it up, it just seems to get stronger. You don't run out of ideas, it's more like you have far too many ideas and you have to cut down. It's the same with making a game and the same with writing a novel.
Secondly, and this is a big one that i think everyone knows, it's not the ideas that have value. Not at all. It's the execution. I can pitch a great idea for a superman/batman movie (seriously, I wrote a 6 page treatment) but actually making a great Superman v. Batman movie, or just flushing out a great script, is the hard part. It's the hard work of putting it all together that gives it real value. And that takes discipline.
So that's what I've learned, or relearned. Creativity is limitless, ideas are only as good as their execution and discipline discipline discipline is the key to bringing this all together.
I'll post my Superman pitch in a second thread...to be ignored at your leisure. :-)