• Ensure that the wires are dry – not near a damp wall or on a damp wall; there could always be a possibility of a short circuit.
• Keep the bathroom floor dry to avoid slipping in an already humid atmosphere
• Work on windows before the rains – or else you will have rainwater coming in.
• Wear appropriate footwear before you switch on the air-conditioner.
• Keep moth balls/naphthalene balls in all your cupboards and air-fresheners in wardrobes to ward off the musty smell.
• Keep a close watch on your expensive paintings - canvases and watercolors to avoid moisture collecting on them.
• Place moisture bags on all electronic equipment, in and around computers, television sets, CD players, and VCRs too!
• Open up the rooms that are not used regularly, especially after a heavy spell of rains, so that the place is free from humidity.

Arm yourself with a proper doormat.

• Use child-safety locks on your switchboards.
• Ensure that your overhead water tank is properly covered so that no rainwater gets in.
• In case, you are in the process of refurbishing, make sure you purchase seasoned wood (it will not expand) for new windows in the home.

Don'ts:

• Use soap on the floor while swabbing – the floor will tend to become sticky.
• Camouflage a wet wall by placing furniture items like cabinets or chairs in front of it – it will initiate a white ant problem.
• Initiate any polishing work on furniture etc., it requires a good measure
  of heat to be effective.
• Wipe your brass and other artifacts with a wet sponge during the monsoons – just keep them away safely wrapped up for sometime instead.
• Exert pressure while wiping your paintings dry – use a soft dry brush instead.
• Wipe your ceiling fans with a wet cloth regularly – it will only add on to the moisture. Use a dry wipe for best results!
• Leave plugs unattended to, lying on the floor. Secure them at a height
  or place them out of reach.
• Over-water your precious plants! Exercise your discretion depending on the weather.
• Allow leaves etc., to collect near the mouth of your drainpipes – on the ground and the terraces - the drain will tend to get clogged.