I use a larger tablet as a flight screen with a lanyard clip coupled to the screen support. Let the controller hang down in front of you: hold the drone on the flat of your palm and extend your arm. With the other hand, reach down to the controller and spread your index finger and the little finger as wide as you can, hook the sticks with your fingers and pull them down and in. Hold them until the rotors spin up. Now release both sticks and then push the left stick (throttle) gently forward. The drone lifts off. Now grip the controller properly with both hands, wait for a good GPS lock and take control of your flight.
Landing is easier. Bring the bird down to just below head height: let the controller hang again, extend your hand with the palm completely flat and hold it under the belly. With the other hand, hook the throttle with your index finger and pull down gently. The drone will land. Here comes the big BUT.... But - you really have to watch your fingers. The Nano might be small but it can draw blood. Mine's bitten me a couple of times because it got a little bit freaky on the final descent and I made the mistake of trying to pinch grab the belly. This is when a drone WILL fight to right itself. Once the drone is on your palm: keeping the throttle stick in the "down" position for a few seconds will kill the motors.
You WILL cock it up a few times, everyone does, but once you get confident, it gets easier and you can think about deploying your drone in really awkward spaces where you haven't got a hope in hell of using the standard "put-it-on-the-floor-and-step-back" technique.