Sit back, relax, preferably in a quiet dark place at first. It will get easier in time.
Deep breaths, in slowly through the nose, out all at once through the mouth. Do this until you involuntarily yawn. Relax…. unfocus your mind. Let your thoughts drift… Breathe…
Eyes still closed, picture any object or area that comes to mind, try to hold the image and build it up until it seems as though you are in the same area with it. You may turn your head to envision the entire area, even move around in it, just never open your eyes or it will all disappear. Add details to your picture, but don't think too hard about it. It's your area, take your time.
This is your pineal gland at work. It sounds easy, but at first you'll find it difficult to master. Before literacy, people used this method to build memory rooms or warehouses, especially merchants. Since then, we have forgotten how to do it, but it does get easier the more you do it. It is also a very relaxing form of meditation, as your body will be resting while your mind checks out your construction. You'll know you're doing well when you don't have to rebuild it each time you visit. It will be waiting for you.
Will you have visions? Some people say yes, some no, it varies. I use it for the deep rest (15 minutes is like a good night's sleep. Great for insomniacs like me.).
On a cold day, I can relax on a tropical beach. On the subway, I can be in the mountains. And yes, as your visualization skills grow, the other senses follow. You will hear, feel, smell, and taste things in your mind.
Is it quick? No. Some people master it quickly, others take time. If you can't go 15 minutes without staring at a little screen, you'll never be able to do it. Aside from the rest it gives you, over time you'll find that your overall memory will improve. You'll actually see an object's location when you try to find it or tell someone where it is. Books you've read long ago you can now read at your leisure, the same with movies, music, and conversations.
Eventually, you won't even need to close your eyes to use your pineal gland. You'll see things as though on a 3D screen right in front of your eyes. Comes in handy if you're an engineer. I didn't need a computer program to look at a system, take it apart, and look at it from various angles to find a potential problem or solution. Freaked a lot of people out when I did that, especially when I moved around objects in front of me that they couldn't see, of course.
Give it a try and see where it takes you.