When I experience Deja Vu, it's as if I'm remembering a dream but my dream matches up with reality.
I remember one specific time I had deja vu in a city I don't live in, where I had traveled there to participate in a workshop. The deja vu suddenly hit me so hard, it was freaky. And this situation was completely unique and unlike any other in my life up until that point.
I like to think of deja vu as being an indicator of being on the right path. I'll think to myself, "yep, i'm on the right track. i'm supposed to be here - this event is supposed to happen." Which allows me to take comfort in my deja vu's. Which is a pleasant feeling.
... if that makes any sense... ?