It's a Buddhist idea and it checks out in research.
It may be a simple as focusing on the taste of your coffee, the crunch of gravel under your feet, the pleasure of good company, the warmth of a fire or the view from a window. Whatever gives you even momentary pleasure.
It's the habit that counts. Savouring might mean sharing your enjoyment with your partner or co-worker, writing about it (maybe blogging about it) painting it, photographing it or simply stopping to experience it fully.