Here's an idea for something we could add to the wiki.
Add the code for short programs that showcase a technique or a command/several commands. For example, a program that did reverse Gaussian elimination for the Euclidean Algorithm would be a good example of the row manipulation commands such as rowSwap(. These would be different from routines, due to being more stand-alone — they wouldn't necessarily be useful as part of a larger program. Their goal would be to demonstrate commands and technique in a real programming situation (it's important that the program not be a contrived example).
On a related note, I think technique pages such as Custom Text Input could be split into two pages — one that describes the technique, and one that gives example code. The way the page is, I feel that it says "This is the code that does custom text input. Memorize it!" Instead, I think it should describe the key components of custom text input: a buffer (usually a string, but it doesn't have to be) for storing the text, a key loop modified for inputting text, and a routine for converting keypresses to input characters. Then, link to routines that do some of these specific tasks (converting keypresses to letters or to numbers, or a flashing cursor routine), and to an example that incorporates a specific choice of routines in a short program centered around custom text input.