I've got far from perfect pitch, but I can relate. In high school (mid 90's) I took up guitar and figured out that I could use (the memory of) the intro to "November Rain" by Guns N' Roses as a way to mentally get an "E" in my head to tune the lowest string and go from there.

I'd heard the song so many times that I found I could recall the low, then high E at the start and that's really all you need to get the rest in tune.