Nice concise instructions @Eugbug.
Since this thread has been bumped I want to mention that I usually end up trimming shrubby growth in early Spring before they leaf out*, which coincidentally is just before Or when I sow peas. So I end up using them as pea supports. Occasionally, some of them root and I have a new shrub or tree.
For example, I have discovered that Red Osier Dogwood is an easy to propagate shrub.
* Note though, that pruning spring/early summer blooming shrubs in early spring sacrifices the flower buds that would have blossomed.