A very basic knot is called the overhand knot. It is the simplest knot in macramé and can be achieved easily by people of all ages and skill level. To make this knot all you must do is "make a loop, and bring the end of the cord behind the loop and out through the loop" (O'Sullivan, 2004, p.142). This not is simple and used widely in macramé projects.
Another easy knot that will get you started creating great macramé projects is the square knot. It is slightly more complicated than the overhand knot, but it is also simple enough to understand and emulate. In order to accomplish this knot you will need at least 3 cords. One will be the center cord or core cord, and the other cords will tie the knot. To make the knot "pass the right hand cord over the core cords and under the left hand cords, leaving a little loop on the right; then pass the left hand cord under the core cords and up though the loop" (O'Sullivan, 2004, p.142). Now do the same action except start with the left hand cord. Remember to always pull your knot tight or your knot will be uneven or it will come undone.
You can also slip beads onto the cords at any point in time in order to create fun additions to your works. When using the square knot it is fun to slip beads onto the center cord and allow extra cord in between knots made with the side cords to create a flower like detail. The bead on the center cord will serve as the inside of the flower.
These two simple knots can make many fantastic works of art. These projects are a lot of fun to create and use, and they are easy enough for anybody to master them.
References:
O'Sullivan, J. (2004). Hippie crafts: Creating a hip new look using groovy '60s crafts. New York, NY: Sterling Publishing Co.