Your balance is not the same every day. Some days you are stronger than others. On the days when you are a little shaky, you can use these tips.
Stand firmly with your feet about a foot width apart. Close your eyes and wiggle a little forwards, backwards and sideways to find your balance.
Read also: 4 reasons why you can't keep your balance
Are you unsteady on one leg while stretching? With certain exercises, the soft surface of your mat can make it more difficult to keep your balance. Get off your mat and you will see that you are a little more stable.
Good grip on the floor makes it easier to keep your balance. During yoga or Pilates you can wear FootUndeez or Nike Studio Wrap, so you don't slip as quickly.
If you don't stand straight, lock your knees or don't contract the right muscles, it's more difficult to keep your balance. You can always fall back on a correct posture and good technique.