1. FMA is king. The aircraft IS doing what the FMA's say. Know each FMA and understand what they mean.
2. When manual flying, hold the sidestick like you would hold your mate's willy, and touch it as little as possible.
3. The serviceable aircraft flies in normal law all the time except for the first few seconds after take-off. Understand what that means.
3. The Airbus is an aeroplane, always remember that. For all the gadgets and gizmos, it still needs an airman to fly it.