Something those with a stalled score can do is use the increase request function in your card accounts. Worst they can do is say no, and it isn't a hard inquiry once you already have the account open. As I payed mine off, every 6 months or so I would go into each account that has that feature and see what they said.
Can be a self trap if you're not disciplined for sure, but what is it going to hurt if you already have 0 CC debt, and pay off your rewards purchases monthly anyways.
Responses were either a fast yes, poof more available purchasing power. Then the other side, a quick no due to lack of use already, or a slow no with a letter to your house, usually with a generic list of reasons they don't offer an increase.
I never saw a score lower from this, only go up when the new limits hit the trackers.