The energy of the 3rd chakra is an energy frequency, which allows you to move in time. Essentially you can move backwards and visit an anchor point in the past, or you can move forward and SENSE a future. Moving and visiting the past feels more “solid” than just sensing the future. This is because the past is mentally considered “done and completed” whereas the future feels more fluid and ethereal. The future, after all, is more subject to change.
 
The skill of sensing the future usually begins first with mental impressions. You then become more accepting of your impressions and with that acceptance and confidence, you then start to receive even greater details with your impressions. For example, at first you may sense singular concepts, such it feels like we need to look for a key. Or you may even see images, such as "I see a key". As your skills improve, you may even get greater clarity and details, such as "I see an old skeleton key buried in the dirt near an old oak tree". As this skill improves even more, you may also start to sense or see multiple objects or images that may be tied together. In a way, it may feel like you are sticking your head through an energetic filter of floating lint, and as you stretch your neck, the denseness of that floating lint gets less and less, allowing you more clarity until you have no filter at all.
 
For me, I more of a visual person, so most of my sensing of the future has become a visual experience. I have also noticed that if I am participating in an activity that requires me to sense the future, the vibrancy of the colors improved or changed, as my skills improved. At first, I saw things mostly in grays or black and white. As the skill improved, I started to notice colors. At first they were more muted and faded, or soft colors. With more skill, the colors also became richer and more detailed. 
 
Also be aware there are different techniques to sense the future, and a technique may or may not work with you. This is because we each have a different energetic signature (or frequency) and some methods may work for your friend, but may not work for you. Also be aware, different teachers will use different techniques to help you sense the future. For example, some Shaman practices will require group participation, using drumming and chanting, with a guided meditation. Other techniques use physical tools, such as the iChing, an ancient Chinese text, which matches numbers thrown by chance when you contemplate a specific and exact question, and then you match it to the response in the ancient text. But my preferred method has been to use an individual process focused with meditation. The process I use is to connect to a “thread” within the prime radiant timeline that is associated with the person I am seeking answers for, or a future date range, or location. I then mentally take that thread and become anchored to the point of my question within the prime radiant itself. I then observe and listen within that meditation.
 
What I have learned in this process to improve my skills of sensing the future, is that I now have an even greater awareness and appreciation this gift is just showing a POSSIBLE future. It is not an exact and solid future; it includes some fine print that says, "this future is subject to change". And it can and it does. This is because energy flows change all the time, and this may cause the future you sensed or saw to possibly change, too.  

Sensing the future is a spiritual gift that provides additional information. This additional information can then be used to help us become better prepared.

When you start to cultivate spiritual energy, you most likely will start having more spiritual experiences, such as seeing flickering lights, or interacting with spiritual beings, or having more significant dreams. But you may also notice new sensations within your body, mind, or spirit. For me I started to feel I was now stepping outside the confines of my body each time I meditated, and with it came a sensation of  total freedom, delight, and wonder.

I also started to notice that when I was in this state of expanded freedom, I was better at conversing and receiving guidance. Later, I also noticed how I was getting better results from the spiritual cultivation process during these  "expansion windows". Then I noticed having a lot more spiritual experiences occurring. 

Over time, I also began to feel sensations I call "the wobbles" as if my inner self was always vibrating. At first, it felt "thick and dense" but over time, it changed to feeling more like a gentle "hum" - kind of like the purr of a refrigerator. For a long time, I didn't know what this was or what it meant. Later I realized this is what is meant by "trying to increase your vibration". For me, this was not something I worked on - it just happened. It was an automatic transition and sensation. What I have discovered, however, is this seems to allow me to  "connect" with other subtle, spiritual energies at almost any time. I no longer have to be in a meditative state to connect with spiritual energies. I can now connect with different spiritual frequencies with mental focus and intention, almost on an ad hoc basis.