Choose a shirt that fits well in the torso and length
Tuck the shirt into properly fitted pants or skirt
Pull the shirt down evenly all around before fastening the waistband
Use the military tuck for extra hold
Wear a belt to help keep the shirt in place
Use shirt stays or shirt garters
Choose undershirts with grip or tuck support
Avoid overly slippery fabrics
Keep the waistband snug but comfortable
Re-tuck after sitting, bending, or moving a lot