Actually it can't be a waste of time. The more time you spend out there in the great outdoors, the healthier your mind AND body become, you will therefore live longer, thereby actually making yourself more time.
For camping or late nights at the beach - Leave of Mountain dew in bottle (just don't drink it all), add a tiny bit of baking soda and 3 caps of peroxide. Put the lid on and shake - homemade glow stick (bottle) solution. Now I don't want to drink mt dew