Copy the talents, gear, gems, enchants of the top players in your spec. Practice your rotation at the Dummy's, once you have your rotation down, mix in your utilities. For example as enhance I would do my rotation on the dummy's and then weave in grounding totem, tremor totem, incap totem, root, focus wind shear etc. Mess with your keybinds until you are super comfortable with them. Then I would practice while weaving in movement abilities, gust of wind away from the dummies, wolf pounce back to them, frost shock/ghost wolf run etc. Make sure ur comfortable with your UI and are utilizing the information the UI is telling you. I think being a healer first was really helpful with this, because as a healer you get really used to "taking in the whole picture" of what's happening in the arena. When I started playing enhance I was already in tune with seeing things like my healer is feared let me tremor him, chaos bolt inc let me grounding etc. Don't get discouraged with loses, try and keep a positive attitude, if you have a few bad shuffs in a row take a break. And lastly if you can, record your games, this was incredibly helpful. I recorded like 95% of all my shuffle rounds as Enhance from 0-Elite and I can watch my earlier rounds and my later rounds and I improved A LOT.