For me it was using a thicker pick. When I started playing I had a hard time picking (I was using a medium pick, so a pick that could bend quite a bit) And I couldn't play comfortably. So I tried a thicker pick one day and it helped a ton! It was like a button that improved my playing, or at least made it more comfortable. (The pick was an unbranded clear blue thing, but eventually I started using Dunlop Tortex 1.14mm) The same thing happened this previous Christmas when I got a pack of Kirk Hammet Jazz 3 picks(1.38mm as I recall) Bit smaller than the tortex, lighter too. Alot of people complain that jass picks are too small, and I understand why. But my hands aren't very large so a jazz pick is perfect for me. Nowadays I can play with just about any pick, but I still find so much ease of playing and control when I use a thicker pick. So what was something small that made a big impact on your playing?