One point I don’t think has been mentioned to date is that pilots who have ONLY landed on hard runways do need to think about the lack of runway perspective cues (width versus length) they will be faced with when landing on a grass field.
In the absence of VASIs this can lead to a bit more care being needed to stabilise the glide path angle within normal limits.
It is no big deal, but anybody who normally feels that glide path assessment is not their strong point should bear it in mind.
The secret of substituting for the lack of runway perspective stuff is to expand your scan a bit more both sides of the touchdown centreline and so try and visualise the perspective of the aerodrome as a whole. Again practice makes perfect.
One way to back up your visual assessment of how things are going on finals is to find an ‘inner marker’ type of ground feature known to be one or two miles out from touchdown and work out how high you should be when you cross it on the basis of 300 to 350 feet per mile from touchdown.