To find the limit of a function as x approaches a particular value, you can substitute the value into the function if the function is continuous at that point. If there is a discontinuity, you may need to use algebraic techniques to simplify the function or apply L'Hôpital's rule if the limit forms an indeterminate form like 0/0 or ∞/∞. Graphical or numerical methods can also provide insight into the behavior of the function near the value.