Similar to what I was saying yesterday, but more specifically, use ALL your ideas–that is to say, don’t ration them out as if you’re starving for them, picking one ‘great’ idea and then trying to build an entire novel around one single observance or cool twist.
Cram all the good ideas you can fit, into whatever you are writing. If you have an idea for a character quirk, or a setting, or theme or funny bit of dialogue, or anything, see if you can find a way to fit it into what you’re currently writing.
Clear those ideas out of your head! Use them and make room for more! Otherwise you’ll end up like a hoarder, your head full of piles of ideas, so tall that you won’t even know what’s buried in there anymore.