Being congenitally stupid, I always say "Undercarriage welded down" or "Undercarriage selected down, (pause with hand on switch until Three Greens), then three greens, undercarriage down". I figure that way I am least likely to forget to lower the gear, or also to rush to the next item and forget the three greens part of the check.
I do the same with propeller and mixture and primer parts of the T/O check even when one or more of them is missing. I simply acknowledge that they aren't there. Same with landing checks.