[racket] coding with continuations

I've been sort of following Scheme since ages agoo when I read Guy 
Steele's masteer's thesis.  I understand the concepts behind 
continuations. I understad some of the schemes by which they are 
implemented with multiple stacks, stack copying, or even Chey on the 
MTA.

What I don't understand is what kinds of coding patterns are effective 
when using them to do really hairy search problems.

Can anyone give me pointers to intelligible presentations of this kind 
of informmation? 

I seen no point in reinventing wheels.

-- hendrik