Reading, clearing words with a dictionary, and then doing/applying if possible. Listening helps only if it's along with reading or doing but by itself not useful. Then repeating this several times until I get it. I don't have a very sophisticated learning method and notes taken usually turn into a incoherent mess that will confuse me more than help due to me usually not having a clear understanding of that which I take notes of. So yeah, could deeeeefinitely improve on my study skills.