For years I worried that by bending to tie a shoe lace or pull on a pair of boots, my CCW would print. I tried sitting with my back to the wall, repositioning theb weapon before sitting, wearing a heavier cover garment, (not an easy choice in FL in summer) and last but not least, leaving the weapon in the truck. Since being unarmed is a non acceptable condition, I only tried that one once.
What I have found to work best is simply to go about your business, try on the shoes and if the weapon prints, assuming carry is legal, don't let it bother you, cause chances are it won't bother those around you. As has been stated here often, if you act with confidence, you could probably walk through the shoe store Naked with your sixgun strapped to your side and few would even notice.
That lump on your side could be a Tumor for all the public knows, and if you call no attention to it, niether will JQ Public.