It depends on your stamina and ability to recall what you've seen. Agents can sometimes look at 20 or more Honolulu homes in a day and easily remember the price, terms, and features of each. Home buyers, on the other hand, particularly those who are just beginning to look, may find that just half a dozen is the maximum. What's important is that you don't get overly tired and saturated with looking to the point where everything blends together. You could miss the perfect home!
It's very helpful if you take along a pad and make notes as you go through each house. List those features that you like and those that you dislike. Savvy agents will usually prepare a printout of the features of each home you are going to see and give it to you so you can write notes on the back. Some really professional agents will bind together all of the printouts into a small booklet so that you can keep them together for easy reference. They may even try to show you the properties in the order they appear in the booklet to help you remember.
In addition, these days most sellers (or their agents) will prepare a flyer that you can pick up at the house that offers a picture and a list of the home's better features and gives its price as well as any special terms. The picture is particularly helpful in recalling a home later on. One agent I know takes along a Polaroid camera and shoots a few pictures of each house to give to her clients to help them remember. There's nothing to keep you from taking along your own camera for the same purpose.
If you have created a "wants list," bring it along and compare it to each house as you go through or afterward, sitting in j your or the agent's car. I can remember going with buyers j on several occasions who did this and sometimes were surprised to realize that the house they had just seen fitted most of their requirements, even though they didn't realize that when they were walking through. (It works conversely, too. You may fall in love with a brick fireplace, but a check with your "wants list" may quickly show the house definitely isn't for you.)
One thing I have found particularly helpful is to have I the agent prepare a map of the area with each house you see (or you can do it yourself). You can list them as 1, 2, 3 j or A, B, C or whatever so that the location on the map corresponds to the printout of the homes seen. I find this very helpful in recalling where I've been and what I've viewed. And, if I want to go back later on for a second look at the neighborhood by myself without the agent, I don't have trouble finding the house.
Finally, don't walk through silently. Speak up. Talk to your spouse, friend, agent, or whomever you go with. Point out what you like and dislike. Just saying it out loud helps fix it in your memory.