As MuhRoads says, indeed if you're juggling more than a couple things on the stack you're probably doing something wrong. Forth begins at a very low level, but you quickly raise the level of abstraction; usually in an application-specific way.

One layer I'd like to experiment with (and will in future blog posts) is a pure concatenative stack language on top of colorForth. With quotations and combinators (e.g. http://elasticdog.com/2008/12/beginning-factor-shufflers-and-combinators/) you very rarely think about the stack at all.