If you meet someone new and suddenly feel that they are not trustworthy or mean well towards others. This would be an example of your sixth sense giving you information regarding them before any other senses can pick up on it.
Other examples are if you suddenly become aware of the danger around yourself without knowing where it's coming from. when there's a feeling in the pit of your stomach, or maybe it's just an overwhelming thought about someone who has been on your mind lately.
These feelings can come from different sources, but they all have in common that they should always be taken into consideration. Another type of message your intuition may send you is through dreams and premonitions; this can happen while sleeping or even during the day when you're wide awake. Your gut will tell you if these things are essential, so don't ignore them. They all mean something for a reason, whether it be good or bad news.