Tutorial for writing generators?

Hi, I just completed the first version of an application.  I now find 
that subsequent version require me to do pretty much the same thing all 
over again but for different types of things.

For example, I need to:
1. Create a new model (say foo) and a set of related migrations
2. Add a bunch of 'belongs_to' statements to the new model
3. Add  'has_many foo' to a couple of other models
4. Create a controller and a set of views for displaying the data in foo 
(like scaffold)
5. Add a before_filter to this controller
6. Create a link to the index page of this controller in my main layout
7. Modify the create method in this controller to create the links 
between the foreign keys
8. Create a POST string to pass data to this controller (to be used by 
another program)
9. ...and so on.

Normally, I would write that list up and go about doing it a step at a 
time.  However, when it comes to Rails, I feel lazy :-S
It seems that the DRY way is to use a generator.  Is there a good 
tutorial that I could follow?

Thanks,
Mohit.

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