Habitual actions cost us little effort and less strain
Habits do not require our conscious attention
Habitual actions save our time
Habits make our movements simpler, quicker and more accurate
Our activities do not become tiresome (no fatigue)
Since the activities become automatic, we do not need our higher mental processes like thinking, reasoning, creativity, etc. for these activities and such abilities can be used for other better activities.
Good habits provide feelings of stableness and security.