Every time you fill up your water bottle or glass of water put a tiny bit of salt in it. Not enough to taste, just a few grains, but it will help with water absorption into the cells. Even better would be to have an electrolyte powder handy and you can make your own “Gatorade” or use a small pinch in your water.
Here’s my “Greaterade” recipe:
Powder Recipe:
1/2 C Celtic salt
1 3/4 tsp Potassium Chloride (aka Nu Salt)
1/2 tsp Magnesium Glycinate
Throw all this in a herb grinder to mix it well and to make it more easily dissolvable.
This Greaterade recipe is for major workouts or other extreme sweating activities. All the ingredients except for the water can be halved for a lesser need for electrolytes. The recipe makes 2 quarts.
Ingredients:
1 tsp Greaterade powder
1/2 C non-white sugar or honey
1/4 C lemon or lime juice
1 C any other fruit juice for flavor
Water
1. Dissolve the powder and sugar in a little water. (If using honey DO NOT use it in this step). It will require a bit of heat, but not boiling. Add a little ice to this to cool it down. You do not want to kill the enzymes in the lemon/lime juice (or the honey) with hot water.
2. Mix everything else up in a 2 qt pitcher and enjoy.

Excellent advice thanks.