Some advice that could save your life: 

Despite its frequency in fiction, complete submersion and death in quicksand doesn’t happen in real life. Objects sink only to the level at which their weight is equal to the weight of the displaced sand/water mix, and then the object floats due to its buoyancy. The average person is only going to sink to his or her waist, elbows or armpits, depending on what they’re wearing and carrying. People who die in quicksand don’t die because they sank all the way in, but because they weren’t able to get out quickly enough and were exposed to the elements — low temperatures, incoming tide, etc.