Every appliance has unique maintenance requirements set apart from others. Your task is to learn most of them, or at least the upkeep tasks for the equipment that you have in your house. There are various references which you may use in performing them like surfing the web, reading the manual that came with the device, and asking professionals who specialize on the said machine.
Knowing these maintenance requirements does not mean that you can do all the tasks on your own. You'd have to be a licensed electrician for that. What you can do is find out what things are doable for yourself and proceed on doing them, and figure out which ones should be reserved for professionals.
Part of appliance upkeep is ensuring that the machine is being used properly. Again, there are many references that you can use for this. The point is not using your devices for things that exceed their purposes, especially when these things can cause damage or deterioration to the materials.
Another is keeping your home's equipment clean. Of course, you know the essence of cleaning your appliances, which is pretty much the same as cleaning your house. But just for emphasis, allowing dust, dirt and debris to settle on or inside your machines can turn them dysfunctional. Remember that in order for any system to work properly, it requires the absence of elements that may distract its procedure, therefore, no dirt accumulation is allowed.
Given that we are talking about electrical machines, safety should be an utmost concern. Though nobody can expect you to be able to mend every electrical fault in your home, except if you are an electrician, you can keep your home safe by applying safety measures regarding your appliances' electrical components and chords. This further emphasizes the importance of keeping them in perfect shape since healthy appliances usually never trigger short outs.
Still on the subject of electricity, maintaining your appliances can also protect you from skyrocketing bills. Broken or deteriorating machines can require more energy than necessary for them to work. Insisting on their usage wouldn't be practical either since you can't actually expect them to still work properly. These situations usually call for replacements.
Finally, it is very important to know when to call an electrician or any specific technician who specializes on a particular appliance. It is also advisable to have a specialist visit your home and examine your pieces of equipment on a regular basis. This allows you to ensure that your machines are still at their best and can still perform at maximum capacity.