After you take each picture, make it a habit to wind the film immediately, so you will be ready for the next picture and you won't risk double-exposing the picture you just took.

Hold down the film catch and turn the winding knob about a quarter of a turn. Release film catch and continue to turn winding knob without forcing until it stops.

Make sure NOT to hold down the film catch for more than a quarter turn, or the film may advance past one or more exposures.