My "simple" method (just also pasted on another thread). I am not an expert, but I cut 7-8 to eight at a time and at most one dies. So I must be doing something right:
1.) Solo Cups with holes cut at bottom
2.) Soil - MG Seed Starter with 30-40% PLAIN (not MG with nutes) Perlite added in. Make it moist, not wet, with PH 6.5 water
3.) Put a little plain perlite at the bottom of the cups (in addition to what is in the soil, I find it helps get it to come out of the cup when I transplant), then fill 1/2-2/3 full with soil. Put a hole in the center with a pencil or something (sanitize it to be safe)
4.) Clean off your scissor, razor blade, cutting surface, etc with ISO
5.) Take your cuttings with a straight cut. Cut one and immediately put the stem in water. Repeat for as many as you are doing.
6.) One at a time, take cutting out of the water, cut off any extra foliage, slice the stem with as much angle as possible (maximize surface area of cut), dip well in rooting gel, place in hole in soil, lightly pack. Repeat for all clones
7.) Pour a SMALL amount of water (1-2 oz) on each to get the cutting firmly into the soil
8.) Get a baggie, make one small slice in the bottom, mist water inside, place over the solo cup
9.) Put them on a warming mat, keep in a warm place with a little light (for eight clones I use 2 normal CFL about 8" above the cups
10.) Mist the baggie daily. Mist around the soil every couple of days, Water when needed (usually not for more than a week)
11.) After about 10 days, make the slit in the baggie bigger, then remove altogether a couple days later