I fly all singles the same. Rotate, positive rate, gear up and accelerate to Vy, at 400 feet AGL flaps up climb power and hold Vy to 1000 feet. At 1000 feet accelerate to a cruise climb and complete the after takeoff checks.
Altitude is life so you want to get away from the ground so you have some options. The aircraft will always climb better with the gear up so as soon as you are safety climbing you should raise the gear. I do not believe in the "wait until there is no useable runway ahead before raising the gear" because in practice it is hard to judge that distance, and in any case so what if the engine fails just as you start to climb away ? You land on your belly, walk away and the insurance company fixes your airplane. An EFATO is just about the worst thing that can happen to you. That extra height from the increased climb rate will give you more time and more options which will always be a good thing