Hurling a sledgehammer at the drywall is a handy way to add storage space for a growing collection of books, beanie babies, or sledgehammers. Explore subtler household improvements with today's Groupon: for $49, you get a one-year HVAC service contract from A.P.E. A/C, Plumbing & Electrical (a $120 value).

The expert technicians at A.P.E. A/C, Plumbing & Electrical master all manner of heating, ventilation, and air-conditioning technology to help households maintain comfortable indoor temperatures regardless of outdoor conditions. Yearlong service contracts include complete HVAC tune-ups in the spring and fall to ensure that heating and cooling units run properly, efficiently, and safely. A battery of tests checks to see if equipment suffers from faulty wiring, burnt-out motors, or pathological lies, and technicians work their way through every part to guarantee smooth operation. Well-maintained heating and cooling units last longer and help homeowners avoid costly repairs and replacements. The service contract also bestows clients with the title of preferred customer and a 10% discount on other services, such as equipment installation or A/C obedience lessons.