Intuition can be broken down into Inner and Tuition, which means that you are learning from within. With your intuition, you make mental connections with previous knowledge that is stored in your amazing brain, and you then determine the probability of future events occurring.
Intuition is an indication of higher intelligence. You assess all obvious cues, cross-reference with your memory, and then develop a reasoned conjecture about the future possibilities. When you hire a new person for your business, or you embark on a project in the first place, or you meet a prospective partner for the first time, you are probably using your intuitive ability.
A more basic version of intuition is called gut instinct, which is hard-wired into your body and brain. It refers more to coping with difficult situations, and with how your brain responds in order to survive the event. We sometimes refer to this experience as extrasensory perception or a 6th sense. With gut instinct, you experience such effects as the fight or flight syndrome, in which your brain and body involuntarily respond to the situation. In ages past, this was to run from the sabre-toothed tiger. In today’s world, it might be to not meet up again with someone you have just met by chance. You just know, although listening to your gut needs some degree of confidence in the process.
Psychologists propose a dual-process theory with decision-making. We connect with both our intuitive (tacit or experiential) and our analytic (rational or deliberate) abilities. Malcolm Gladwell describes the two processes as blinking (the intuition) and thinking (the analysis). The blinking is done when a decision needs to be made immediately, and the thinking occurs when there is time to ponder the options. They are both valuable concepts, although Gladwell contends that “There can be as much value in the blink of an eye as in months of rational analysis.”
Intuition can give your brain a rest. Rather than having to think extensively about something, you simply jump in with your intuitive response. Is it always valid? No, because this quick response can be tainted by subjective judgement that is affected by your biases and lack of contextual knowledge. However, modern life and work in particular can leave you with little time to ruminate at length on an issue.
Intuitive responses may save you both time and energy, and especially when you have sharpened your intuitive pattern-making ability. When you are an expert at something, it is partly because you have experienced many situations that collectively built up in your memory. If you then face another similar pattern forming, you can intuit what is likely to happen.
In Thinking Fast and Slow, Daniel Kahneman outlines three principles that need to be satisfied before you can trust your intuition.

1. There are boundaries on the environment that you are making an intuitive prediction on (it is a slow and unchanging system)
2. You have a lot of practice in making these intuitive predictions (there is a large sample size)
3. You receive immediate and accurate feedback from your prediction

Perhaps you have just begun a new relationship, and you are already predicting the wedding in your own mind. That is not intuition. It is hope. None of the three conditions apply in this case (unless you have had lots of practice with new relationships).
How can you enhance your intuitive ability for now? Find your natural pace. Sense what is all around you, rather than rushing everywhere without observing what is nearby. Meditation would be a great start and can help you to rediscover that natural pace. Acknowledge the messages that your body is giving to you. Learn to sense those messages rather than ignore them. Be aware of what a constant technology overload may be doing to you. Learn how to take some time away from electronically artificial stimulus.
Go back to physically handwriting in a journal. Too many people have forgotten what it is like to hold onto a pen. This utilizes your fine motor skills and stimulates your thinking. Look to nature for indicators of intuition. Animals do not consciously think when determining what to do. Observe your pet dog / cat / fish / parrot as they respond to stimulus. Animals act intuitively, and often in synchrony with their flock or group.