I am one of those people with ongoing intermittent landing problems. I
have good patches - managed to get solo recently - and then bad
patches. The bad patches probably co-incide with forgetting to look up
as I start the round-out, so there is no hold-off and a rather heavy
landing, sometimes with a bounce.

I've got my own ideas on how to address this, was curious if anyone
else here has had the same problem and if so, how did you deal with it?
Unfortunately I reckon I developed the bad habit fairly early in my
flying, as it was well-established by the time someone pointed out what
was going on. Since I seem to be reasonably good at doing what I'm
told to do, via a route from ears to hands & feet that misses my brain,
I suspect I've flattered to deceive in the front seat.