After closing on your new home, get familiar with the appliances and mechanical systems by giving them a once-over:

Locate your fuse or circuit box and get familiar with how it works, says The Family Handyman. This may be helpful if you ever need to manually shut off power to a specific circuit or your entire home.
Note the location of the main shut off valves for your utilities, such as water and natural gas. If a pipe breaks or there is another emergency, you need to know how to shut off your home's utilities.
Survey your electrical outlets and lighting to see if you have enough in the right places. It may be easier to add new outlets or lighting before you move in heavy furniture, says The Spruce.
Check the furnace filter and change it if necessary, says The Family Handyman. You may also want to consider having your HVAC system tuned up to be sure it's in good working condition.
Keep an eye out for plumbing leaks and make sure you know where the main water supply line is and how to turn it off, suggests HouseLogic.com.
Check the carbon monoxide and smoke detectors and replace them if necessary, says The Family Handyman.