Updated Making OpenSeadragon Plugins (markdown)

Making-OpenSeadragon-Plugins.md

@@ -6,3 +6,18 @@ Tips:
 
 * `OpenSeadragon` is the namespace for all OpenSeadragon properties, classes, and methods. Adding a new top level function could be as simple as `OpenSeadragon.myFunc = function() { ... }`.
 * If you want to add methods to any of OpenSeadragon's classes, add it to the class's prototype, such as `OpenSeadragon.Viewer.prototype.myFunc = function() { ... }`.
+* Minimize your plugin's footprint: instead of adding a bunch of new methods, just add a single multi-purpose method. That way you're less likely to collide with other plugins, and it'll be easier for developers to keep track of what belongs to your plugin.
+* Use an "options" object in your method to keep things flexible.
+
+Example:
+
+```
+(function($) {
+  OpenSeadragon.myPlugin = function(options) {
+    options = options || {};
+    if (options.foo) {
+      ...
+    }
+  };
+})(OpenSeadragon);
+```