The secret is to not shop there for a few months. HF will then email you a letter saying "we missed you" with a coupon for 25% off any one item in the store with no exceptions (other than gift certificates and club memberships).
When you buy your big ticket item, make sure to buy another doo-dad or two, and stop by a week or so later and grab something else. I'm told they track whether that special coupon gets you back and buying other things. If so, you are more likely to get another one in the future if you are absent for an extended period. If I don't need another tool, I'll just pick up some consumable, like zip ties or a pack of angle grinder cut-off wheels.