What are the very basics that every /out/ist should master?

For example I spend a decent amount /out/ but it's mostly beach related stuff and hiking low duration camping so I'm not very competent with navigating by stars or sun, hunting or having many different type of knots on my tool box. That being said I would like to deversify and keep moving forward and acquiring new skills so yeah, feel free to throw some ideas into the puddle.

Thanks.