Warm lather feels great, but you need to get a shaving brush first.
Once you have the brush, put the soap in a mug (a shaving mug is optimal, but a coffee mug will do), wet the shaving brush with hot water, shake out the excess water from the bristles, rub the bristles vigorously around on the soap to make a lather, apply the lather to the section of the scalp/beard you intend to shave immediately, shave that section, rinse the bristles with hot water, shake them out, make more lather, apply, shave, repeat.
When finished, drain the water from the mug and hang the brush in a stand bristles down or at least keep it on its side to dry.
(Now I'm in the mood to do this when I get home this evening.)