I meditate (Anapana Sita and Vipassana(I'm actually off on a ten day retreat in a couple of days
)). I like that not just because it works. It is independent of the outer. Completely self dependent. I can be alone in a dungeon or surrounded in a palace. The sole objects of the meditation are within on the personal mind/body using no mantras or visualisations so it's universal. Good for anyone of any creed age or gender. So if I'm alone, in the dark, I
always have that.