Use a pair of clean and sharp pruning shears to cut a long stem about 8 inches from the main stem or from the ground. Two new buds will form from this cut, starting two branches.
Wait several weeks to let the branches grow, until the two buds are each about 10 inches long.
Trim the two branches back to 8 inches each to force four new branches to grow. If you do this with each of the branches, over time you will have a thick, full bush instead of one or two straggly branches.
Remove any dead leaves by trimming them back as close to the stem as possible. If any leaf tips are browned from a lack of water, trim them back just beyond the dried portion with a pair of scissors.