I am propagating long stemmed cuttings into my washed recycled milk carton pots
The long stem method, with a rooting hormone (Indole Butyric Acid) to encourage fast root growth produces good results. Honey is also meant to be a way of encouraging root growth (see this comparison experiment by Stanley Barker).
Plants that are very easy to proagate are lavendars, wormwood, buddleia (butterfly bush) and salvia, and I have even put in some cuttings from my grafted olives to see how they go.
More adventerous is my "hedge in a box" - 24 Westringia cuttings.