Clean water is absolutely essential! The lifestraw is a good first step. I'd also recommend picking up one of these:

https://www.amazon.com/gp/product/B000KUVVY4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Or similar. This lets you filter water into a nalgene bottle. The life straw, as far as I know, requires you to suck the water. Not all the water you are using will be consumed directly, so being able to filter and save the water into a bottle is ideal.

Also, this filter uses a 2 stage system that uses a ceramic stage. This will get the water a little cleaner than a life straw.

Good reminder for everyone though, water is life. Make sure you are able to purify your own.