The best time to start practicing approaches is just after your plane has taken off, especially during your first flight of the day.

Do it over and over until you're getting a bit bored by it.

This will adjust your "memory muscle" so that should a problem occur you'll be ready.

Each day at the field I bring out different planes, so it is important for me to re-familiarize myself with that days planes landing characteristics.

Better to do this with a full tank when you are "fresh" for the day.