Cross wind landings. I'm not going to tell you how as it really depends on your aeroplane. When I collected my first Bulldog from Prestwick in 1973 (or was it 72?), I asked what the crosswind limit was. After all, it was a bit of sport in my Chippy. The company test pilot said there is not one. He explained that up to 35 knots the Bulldog was great; more than 35 kms, use a diagonal. At 50 knots land across as your groundspeed for short runways was down to taxi speed, so most runways were wide enough. Mind you, my slightly bigger aeroplane, the venerable VC10 was a bit more tricky, but as none are now flying, I'll not bother you with the technique.