I have less merit than I would like to send.
You can apply to be a merit source:
Hey, thanks for the suggestion but I'm not going to apply, at least for the moment, as I think I'm not a somewhat established member, and the fact that
It's been a while though since a new merit source was added, and several applications have been unanswered for a long time.
doesn't motivate me much, but maybe in a few years I will give it a try.
If you are out of merit, and are aware of a good post without merit, you can report it to merit sources
here.
@Poker Player: feel free to post some of your own best posts (with or without Merit) in
Report unmerited good posts to Merit Source. You're not a bad poster, so I don't think Merit should be holding you back. But I don't have the time to read hundreds of posts, so please make it easy for me

Thank you very much, I will use it at some point.
Thanks to the others also for the answers.