To answer your question, how do I think about landing since not always in the same type - first thing I always make sure to do is slow the action down - meaning on late downwind or base, set myself up for slow flight. I do this because I've gotten myself surprised occasionally when going to a type that cruises faster than the last type i was on. Then of course fly the numbers for the plane in question, and then I use the runway expansion effect to assist me with the roundout and flare timing. That helps me think about it until I've had enough time to get a feel for it.
i've found the hardest transition is between high wing and low wing, but have yet to try tail wheel or anything like that.
how about you?