A being with supernatural senses commonly uses their senses simultaneously, or in tandem with their subconscious, giving them a degree of extrasensory perception. This "super-sense" commonly allows them to detect or identify other supernaturals.
The sensory tactic allows particular beings with said senses to recall repressed memories that could be lost during a fugue state. This phenomenon has been likened by Lydia Martin as similar to muscle memory being utilized by a hand-to-hand combatant in Required Reading. Derek Hale outlines this technique in detail in Pack Mentality.
By visiting a particular location they don't remember being present at, or touching a physical object they don't remember doing so, their senses of touch, sight, smell can allow for said being to trigger the memory senses, to remember those missing recollections.