There are some really good books on the topic, you can probably source these (or similar) through your local library or search for the author's websites for more tips:
Angels and Companions in Spirit by Laeh Maggie Garfield and Jack Grant'
Spiritual Growth/Opening to Spirit (or any of the other books) by Sanaya Roman
There are several books including Practical Intuition by Laura Day (very good author & spot on).

In general, it involves learning to hold awareness of what's happening in your body, different people get the information in different ways. Eg one person might meditate on a question and see lights and get info that way, another person might find they have meaningful words come to them at different times. Meditation is a very good start to developing your intuition. HTH