Two simple rules will likely solve most of your problems:

1) Don't be out at night

2) Always have a rested buff

There's a timer in the upper right for rested buff, so that's easy to track. It works just as well to know when night is coming if you have an idea around when you last rested.

Just carry a portal with you, and, when the timer gets low, plot it down, sleep, eat, and start your new day.

If you are like me and don't use portals, just carry a stack of wood, and build a basic shack anywhere it about a minuted that you can sleep in and get 11 minutes of rested buff.