The "easiest" cloning method imo is just using peat or another inert medium and a humidity dome. Types of aero-cloning probably fit more into "faster" methods of cloning but are a little more complicated. We haven't finished this cloning how-to, so it may be a little rough.
Start clones under 24hrs light until standing up (about a day) then switch to 16/8. Roots grow fastest at night, so all rooting clones should have a dark period. Use peat pucks buried in damp perlite. Cut all clones from a given mother at once, placing each in a shotglass of water as soon as it's cut. Re-cut each stem under water, hold it in the water for a minute and then dip in rooting powder. Re-dipping in water after applying the powder has been tested and found to be a bad idea. Alternatively, they can be re-cut in liquid rooting hormone. Clones must be planted in the pucks immediately. We use a large metal pot with a glass lid set slightly ajar. A heating pad is mandatory and there must be plenty of insulation between the pad and the clone pot. Use no fertilizers. Wet peat pucks with plain water ph'd to 5.8. Arrange the clones inside the pot and cover the peat pucks with damp perlite. Place the pot under fluorescents. The lid of the pot should have slight condensation in the middle. If water drips from the condensation, the humidity is too high. If it's too high, set the lid more ajar. The humidity should be just high enough to keep the clones alive but still less than the dampness of the peat. If the clones get too much water from the air, they won't grow roots to reach out for more water.