~ Don't wear any kind of makeup. It's a waste of time and all the space it takes up in your bag could be used to carry supplies

~ Your hair could easily be messed up by the wind or from running, so don't bother taking ages to style it. Just wear it in a way that's practical.

~ If you tie your hair up, it'll be easier to run because it will stay out of your face.

~ It's easier to have short hair because it's harder for someone or something to grab on to it if you're being attacked. You could also keep your hair tightly braided if you're reluctant to cut it, but this options would waste more time than simply cutting it off.