best way is to draw the figure and draw all the forces acting on it, ex: weight, reaction to a wall/the ground, etc. then normalize all the forces to: (up, down, left, right) or depending on how the figure is, you can just normalize it in any angle as long as all the forces are 90% from each other then add them all and use negative on a direction you set ex: left is -ve, down is -ve with that you can do basic addition/subtractions to get the exact forces with direction