yoko1 - good stuff. I also had a couple of CFIs teach me to "fly the runway." It certainly helped me "get the picture" and the feel for where the runway was.
Another thing that worked for me in my early GA years was to look straight down the runway, but also use my peripheral vision of the runway sides to judge the start of the flare. But one does have to adjust that when switching between 50m-wide runways, 30m-wide runways, and 9m strips (or "pieces of string" as my significant other calls them). The aircraft's shadow can also be a useful reference for that (when available).
The only other landing tip that always helped me was after the flare was established - to just slowly keep adding back-pressure and let the wing decide when it was ready to quit flying. Usually, that gets me within cms of the surface before settling on.