Use a foam pad to apply products, a microfibre pad or cloth to work it in, and a clean microfibre cloth to buff off. This applies to most products.
You can get megs foam pads from halfrauds. Quick mist with quick detailer to dampen the pad and load the pad with wax. I tend to use a clean finger to rub the surface of the wax to ensure there's no 'skin' on the wax. Then place pad into jar, 3/4 turn and apply to car in smooth circular motions. Make sure there are no lumps of wax on the pad before you do this. Leave to haze and then buff off with a microfibre cloth. Once fully cured (usually 24 hrs) you can apply a second layer.