Kirstey, surprised to hear you think I should be called acock for my post! Perhaps it was not the most sensible answer but I can't say I really understood the question.
Lumpjockey - When you say "landing" speed I assume you mean approach speed which as we all know can be around the 50kias mark with the barn doors fully deployed on a 172.
With thirty degrees selected I normally find that x-ing the threshold at 65 is ideal and gives that little bit of extra speed in case of a sudden stale bit of air in the last stages.
On a x-wind approach (with some sideways crab on) don't forget that your speed over the ground with 65 kias is faster than normal and everything does seem to come up at you that much quicker.
I always make sure that the a/c is trimmed with plenty of nose up on final approach as this makes the flare and hold off so much easier.
Hope this is of some help.
Monocock (AKA ACOCK)