you only live once or dollar cost averaging, how do you invest?

I been told dollar cost averaging is the best.. but i always seem to just throw caution to the wind and throw it all in at once. my reasoning behind this; once i throw it all in i get to forget about it, but if i average in i always gotta have it in the back of my mind… then theres people who only average in on red days or dips.

how do you invest?