Generally (and I use that term very loosely since we've only been doing this for three weeks and change), having a fussy, wide-awake baby one day leads to a peaceful, sleeping baby the next day.
Additionally, excessively kissing and hugging said sleeping baby usually wakes him up and makes him surly - so don't do it... too often.
ps-I know the rules, Sean was only sleeping on his tummy for the photos.