More brain tasks - the design of Rebol programs

One of the attractive aspects of Rebol for me was the promis of a new way of structuring programs/systems based on the notion that there is not a lot of difference between data and code. The thing is, over the years I've formed concepts of what is good design and programming technique for dealing with other languages and I find myself learning/discovering anew what makes a good design in Rebol. I'm writing this email to get people's thoughts on how "good" designs can be constructed in Rebol. What constructs, patterns, etc give flexibility, reliability, etc. Thoughts? Brett. Hoping for a higher Rebol awareness :)