Short Person here
I usually mount the bike just like a horse, I seat my left clip into the pedal and roll the bike forward while swinging my leg over the seat and clip in on the right. It's the Trainers I have problems with. Every time the LBS guys put my bike on the trainer I can't get on or off the thing, it's just too high.
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"