Hi - As stated I need help pruning a jade plant I inherited from a friend. It is healthy but extremely top heavy as it has been growing out of control for a long time. Here are some pics:

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It is currently propped up by a bamboo skewer but I would like to prune it into something more shapely and then root the cuttings. From what I gather a sharp blade like a razor is crucial. Any suggestions on what to cut and where? How much can I lop off at once?