Here is something you can try, someday might come in handy. When you are somewhere alone and without any of your tools, magical supplies, learn how to use the elements to create a sphere of spiritual light around you. Even though at the moment, there is no circle casting materials...no wand or athame, nor candle on an alter. But you have your mind, body, will, and as you will so shall it be.
Make sure there is plenty of space around you and the center of your area good to sit down for meditation. The energy will be there, just as when doing spellwork, but no tools, candles, herbs, stones, etc. to focus and tune, direct the energy. What happens will depend on how well you learn to do this using mind, will, and body alone.
Stand in the center of this space you have chosen to work in. By the way, your body does contain salt. Ever sweat on a hot day, have it run down into your eyes? It burns sometimes doesn't it? There you have salt and water...whether sweating or not, salt is in your body.
Now walk toward the East until at the edge of this space. Standing there visualize the color you associate with the element air. Start chanting "Powers of the East" while pointing a finger as if it were a wand. Then walk deosil and follow a circular path to the South...do the same using color plus chanting...then West, North. Keep going until at the East again.
Return to the center and visualize the space as a circle...sit down now if you need to, begin by offering a prayer or do a meditation. The space should begin to feel like it contains power or light.
When finished ground or send off the energy for what you're needing it for...practice, as they say "practice makes perfect" and good luck.
