“It is essential to master the art of standing correctly. One thousand things that apply to Tadasana apply to every other pose. See how much your intelligence has to peep in, has to go in, even to understand tadasana? When truly in tadasana, one feels light in body and the mind acquires agility.” Guruji B. K. S. Iyengar
Bring your feet together lovingly.
Toe knuckles touch.
Heels are about an inch apart.
Find your balance. Are you favoring one side over the other?
Evenly distribute your weight, using your toes to stabilize any forward motions.