There's really nothing difficult with home showing. You can do it effectively to sell your home. However, if you have the means and the time, you should do a number of things to increase your home's chances of selling. There are two important things that affect your home's chances of selling: first impressions and human nature. First impressions count a great deal, especially when it comes to selling a home. In the other factor, human nature, the buyer is moved to make a decision based largely in part on his or her emotions. Thus, what you want to do is create a positive impact on a potential buyer's emotion so he or she is more likely to make an offer on your home.
What you want to avoid is an attic, basement or garage that is so full of "stuff" that people cannot get around in it. A potential buyer could get turned off when he or she sees cramped rooms. Get your decades of accumulated stuff out of your house and into a storage unit. Thoroughly clean those areas once you have all the things in them cleared out. If you've got an unfinished basement, you can simply get a few extra lights and place them strategically in the room. You want the lights to be on when you're showing because it will make the area look more appealing.
You can't really choose who to show your house to, and you'll find that some people are curious. For example, you could get somebody who will open and close all the windows. All they're doing is checking for problems that they could have to pay for fixing, so you do that and make sure there are no issues with all your windows. If you see any damaged screen, get them replaced as soon as possible.
If any of the windows are hard to open, it could be that the tracks are dirty. You can simply clean the tracks and that should make opening and closing the windows easy. For smoother operation, take a rag with a little oil and then rub it up and down the tracks.
There is a lot to think about with electricity in your home such as the outlets and wall switches. Buyers will want these things to be in good working order and if they aren't, they'll expect them to be fixed. Go from one room to the next flipping on the light to make sure the wall switches are working properly. Have any damaged switch replaced.
You can buy outlet testers in any good hardware store or department store. An outlet tester is great for checking if your outlets are working. You'll know what problem needs fixing from the LEDs on the tester that show any problem. Realize that the home showing process doesn't have to be too difficult or stressful a time for you. The key is organization, and if you approach the process methodically, you will do well. Stay within your budget that you have created for selling your house. Attend to the little details as well because they can have an impact in the buying decision.