There are a few common values of fairies which will allow you to match their frequency more so they may make themselves known. First of all, fairies bear a childish spirit of joy and innocence which can be forgotten by adult humans due to stress, trauma and responsibility. There are nature spirit fairies who manage plants and animals. The nature elementals, a type of fae, were described by Paracelcus and include salamanders (fire), sylphs (air), undines (water), gnomes (earth) and devas (spirit). There are others that have different ways of helping others.
The Otherworld is known to be a wild, raucous and sometimes dangerous place, with queens and sometimes kings heading courts, with the trooping fairies and solitary fairies sometimes said to be a distinctive divide. Combining a rather present-minded mental state with an innocent joy for nature is the most advisable way to get more in touch with them. It may also be a good idea to find a map of the ley lines, the crisscrossing grid of energy laid across Gaia, and travel to a line or nexus, as supernatural occurences are far more frequent around these areas. Be careful, though, some fairies are quite wild, so it is best to practice protection, whether invoked from spirit guides or using self-practiced magical means. Keep a balance on their reputation, do not be swayed one way too far. There are troublemakers, sure, but there are those who are quite nice, but generally have a different culture. Higher-dimensional fae, from about 5D on up, would generally be wise and benevolent, however always be careful of charlatan spirits and be aware of your mental health if you decide to try chatting with them. If you hear an inner voice that sounds like it is from the outside, my advice is to ask yourself Is what this voice saying wise?
. A voice heard while channeling could be a lot of things. Honestly, channeling is not for everyone.
The color green which is so important to them is bore by most plants and symbolizes love and is the same color as the heart chakra, as well as all the associations with one of the most powerful deities on Gaia, Inanna. Inanna is also known as Ishtar, Astarte, Aphrodite and Venus and takes on the qualities of the luxury and bounty of the Divine Mother. Gaia herself has a very similar energy, bearing a motherly personality of extreme generosity. Being heavily influenced by the Earth element, fairies may seem very caught up in aesthetics and sensible beauty. It would be best to understand that aesthetic sense is a way to detect energy manifested as Earth. There are also the Merpeople, a race of water fae, commonly incarnate as humans and are allied with the land fae. They are known for their extreme empathy. Merpeople are making their presence increasingly known and even have their own conventions.
Notable historic figures and legends regarding fairies center around Thomas the Rhymer and Robert Kirk, and the Cottlingley fairies event which caught the attention of Arthur Conan Doyle. However, they are still being contacted today; find a local druid or shaman, or even children, and they may have stories to recount to you themselves!
Fairies have especially interacted with humans in the Middle Ages. Nowadays it tends to be more discreet but it should swing back to more frequent sightings and even full societal integration. Many fairies follow certain human bloodlines around. This includes immigrating with them; certain ethnicities may have certain fairy folk around them which followed them from their ancestral lands.
There are plenty of fae incarnate here as humans, myself being one of them! Their blood is mixed frequently with certain people, and it is very powerful. For me the blood "activated", and I gained powers and started to become more fae-like in my appearance and behavior. Some traits they tend to bear in common are a primal attachment and devotion to nature, interest in the esoteric earth magic of herbs and crystals, bold expressive eyes and youthful qualities.