One rule of thumb is to try to appeal to as many of the five senses as possible. The sense of sight of course has the largest impact on your buyers. One way this sense can be appealed to is by neutralizing wall colors in the home. Most buyers can overlook neutral colors even though they may not choose the particular colors for themselves. But in general buyers have a difficult time overlooking dark and/or bright colors. Also eliminating personal items from view as much as possible such as children's toys, family pictures and other personalized items such as collections of dolls etc. can help improve the experience. Try to maximize room sizes by eliminating excess furniture or large items in small spaces. Having things well organized and clean is also very important.
Another thing that creates an immediate negative reaction for a buyer is obnoxious or strong odors. For instance, if you have pets, or someone in the household smokes you may have a pet or smoke odor, to which you may even be oblivious. You may want to have an impartial person be your "sniffing dog" to determine this for you. And if this is an issue, you will want to address it by either installing an air purification system or at the very minimum you will want to be sure to create a pleasant aroma when the homw is being shown. This can be done through a number of methods either with air freshening devices or there is nothing better than the smell of just baked chocolate chip cookies or a roast in the oven. This will immediately eliminate negative sensations and even create a positive experience for a potential buyer the moment they enter the home.
Also since you baked the chocolate chip cookies anyway you may want to put some out on a dish with a little note to your potential buyers to "help yourself". Needless to say this will engage the sense of taste which if nothing else, will add to the overall positive emotional experience of viewing your home.
The last sense to which is easily appealed, is the sense of sound. Some nice quiet neutral instrumental music is relaxing and just adds to the potential overall positive experience.
The one sense that probably has the least impact on your potential buyers is the sense of touch. However, going back to the sense of sight, potential buyers should feel safe in touching surface areas, doorknobs etc. If the overall appearance of the home is not spotless and clean, this may deter buyers from looking in certain areas, and positive aspects of the home may be overlooked.
In conclusion, of course doing these things is not going to guarantee the sale of your home. However, if all of the other elements are in place, such as price (and in this market this is a big one), a good marketing strategy and a good agent/agency to help you, you will have the much needed edge over all the others to GET IT SOLD!