Allow the break or cut of an aloe leaf to dry out overnight; it should skin over and stop bleeding sap.
Fill the pot with cactus potting soil. Aloe vera are succulents that need excellent drainage at all times, even when rooting.
Insert 1/3 of the aloe leaf into the cactus potting soil.
Water the aloe leaf enough to dampen the soil. Don't allow the soil to dry out, but do not over-water from here on out. Succulents will rot in standing water. Mist the leaf and soil surface every three days.
Allow the plant to root without disturbance for a month.