cammd said..
I know this goes against everyone's advice but I put my back foot in first, even before I am hooked in and planing. I have all my weight on my front foot, slip the back foot in the strap, hook into the harness then transfer my weight from my front foot onto the harness and bear away, the board takes off and you have all the time in the world to easily put you front foot in the strap without rounding up or getting catapulted.
You can get away with that when there is enough wind.
When the wind is light, its more efficient to use the front foot first method.
To do the back foot first method in really light wind, I had to put a lot of my weight onto the mastfoot through the harness/boom and keep the sail powered, so I could get my foot into the back strap with no weight on it and use it more as a hook than to put my weight on. Then to put my front foot in, I had to put most of my weight on the harness/boom and some of my weight on the back foot and get the front foot in quick.
In stronger wind you can keep almost all of your weight on the front foot and hook the rear foot in to prevent a catapult, then power up and lean on the harness/boom to get the front foot in.
So in really marginal light wind, I find its not just more efficient to put the front foot in first, its easier.