You could try layering. Pull a supple branchlet this years growth down and bury a node or two in the soil. Do this in late summer/autumn
or get peatmoss and wrap around a thin branch, cover this in plastic and tape the ends of the plastic so it doesnt dry out.
Air layering can be used to propagate large, overgrown house plants such as rubber plant, croton, or dieffenbachia that have lost most of their lower leaves. Woody ornamentals such as azalea, camellia, magnolia, oleander, and holly can also be propagated by air layering. For optimum rooting, make air layers in the spring on shoots produced during the previous season or in mid to late summer on shoots from the current season's growth. For woody plants, stems of pencil size diameter or larger are best. Choose an area just below a node and remove leaves and twigs on the stem 3 to 4 inches above and below this point. This is normally done on a stem about 1 foot from the tip.
Air layering differs, depending on whether the plant is a monocot or a dicot. For monocots, make an upward 1- to 1 1/2-inch cut about one-third through the stem. The cut is held open with a toothpick or wooden match stick. Surround the wound with moist, unmilled sphagnum moss (about a handful) that has been soaked in water and squeezed to remove excess moisture. Wrap the moss with plastic and hold in place with twist ties or electrician's tape. No moss should extend beyond the ends of the plastic. Fasten each end of the plastic securely, to retain moisture and to prevent water from entering. If exposed to the sun, the plastic should be covered. Aluminum foil can also be used, as it does not require twist ties or tape to hold it in place.
http://www.ces.ncsu.edu/depts/hort/hil/hil-8701.html
The older the wood the longer it will take to root. Usually it will take a full year to get good roots started.
Heres another method (scroll to outdoor propagation techniques), however I think if cuttings are to be used planting into a box filled with river sand then covered in plastic will work better. (drainage is an important issue).
outdoor propagating
Dusting with rooting hormone powder or painting with a liquid will assist to develope better root systems.