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Plan for code reuse.
The loose coupling in Objective-C makes it very easy to reuse code. If you use delegates, protocols, action methods, and key-value coding in a class, then it's easy to replace the classes that it interacts with. Even if you don't think you will need to reuse a class, try to avoid tightly coupling it to the rest of your code. You may find another use for it later, and it's better to use a class that you've already tested than to write a new one.
For more tips, and more detail about this tip, please see my new book,
Cocoa Programming Developer's Handbook,
available in print and electronic formats.
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