Hazrat Moulana Ashraf Ali Thanwi (rahmatullahi ‘alaih) once mentioned the following:
When it comes to following the sunnah, then generally, people only think of the sunnats of salaah, fasting, etc. However, there are sunnats that apply to every dimension of human living, which Rasulullah (sallallahu ‘alaihi wasallam) has demonstrated to us in every situation of life. If a person emulates and upholds certain sunnats, but neglects to practice on other sunnats, then though he will receive benefit, he will not receive the full benefit of emulating the complete sunnah.
(Malfoozaat Hakeemul Ummat 13/227)