So-called softwood cuttings, such as coleus and pelargonium (common geraniums), are easiest to root. Semihardwood cuttings, like boxwood, take longer, though willows and forsythia are easy to propagate in early spring before they bloom. Timing varies enormously, so always research the right time to take cuttings for each plant.
Take cuttings about 3 inches long using a clean, sharp pruner (dull blades will crush stems and encourage rot). Strip away the lower leaves.