landing
When I was learning to fly I had one piece of advice that my instructor gave me which served me well in this exact case. And I have passed this advice on to everyone that I myself have taught to fly. Shoot touch and gos. I'm not talking about just a couple. But and am talking about multiple flights on multiple days. Just keep shooting the touch and gos. after a few days you'll be able land your plane on just about any field in any wind condition. I know that this sounds boring, but it's well worth the time you will invest in doing it. Heck, sometimes I'll take my ultimate bipe and quit burning holes in the sky with it and spend a tank of fuel shooting touch and gos.
I read a post on a different forum about a year ago where they were discussing the most difficult manuever to do correctly, and I agree when somebody posted that it was the landing.
As with anything else in this hobby, practice makes perfect.
Good luck.