It is easier than people think to use their intuition. Imagination is the key. You just have to imagine you can smell something, taste something, feel something, hear something and see something. Over time you get to trust yourself and your ability to use your intuition. Your abilities can just grow,
Being able to sense something intuitively is called psychometrising. You can get quite analytical with it, and use it in all kinds of situations. There is an article about psychometrising on the blog.