Druid's macros

Enjoy Forms

/cast [modifier:shift] Cat Form; [modifier:alt, flyable] Fly Form; [modifier:alt] Travel Form; [modifier:ctrl] Aquatic Form; [stance:1] Cat Form; Bear Form

This macro allows you to have all forms on one button, now I explain:
I consider Bear Form(or Dire Bear Form)as the safest form, so it's the one you'll take when you press the button, from every form but Bear one. In fact if you are in Bear Form, you'll pass to Cat Form.
Then, using the modifiers, you can reach also the other forms: shift + button will always cast Cat Form, alt + button will always cast Travel Form(or Fly Form ifnyou are in Outland), ctrl + button will always cast Aquatic Form.

Every form's spells
My suggestion is to apply a stance modifier to many buttons, so you will be able to do, with the same key binding, the right action, depending in which form you are.
I use this for the attacks, while I keep unmacroed buffs and healings.
Buffs and healings will make you automatically switch to caster form.
The macros will all work like this:
/cast [stance:1] #bear's attacks#; [stance:3] #cat's attacks#; #caster's attacks#

stance:1 is Bear form(or Dire Bear Form)
stance:2 is Acquatic form
stance:3 is cat form
stance:4 is Travel form
stance:5 is Moonkin form or Tree of Life form
stance:6 is Fly form
you can also set some caster's spell for Travel form and Acquatic form, but usually Feral druids won't need that, as they'll always switch forms, before fighting.

It would be much easier to use TrinityBars (at the moment the version 2.0, updated fr patch 2.4).
That's the best action bars addon I've found and simply checking a box in the config menu of a bar you can make it respond to form changes, much faster than macros and easier to change.

Maul + Swipe
Actually you could make a macro like this:

/cast Maul
/cast Swipe

Maul works "on the next meele attack" and Swipe is a instant meele attack.
In this way you can be a bear that attacks as fast as a cat.
The problem is, of course, that this costs a lot of rage, so I suggest not to use a macro for this, but do it manually, when you have a lot of rage and few health.

Maul + instant
What said for the macro up here is true for all istant attacks: they all can be used with Maul

Don't break Maim
You will need this one.

/cast Maim
/stopattack

When you cast Maim, you won't stop attacking and this will break the imparing effect.
You don't want this!
This macro will make you cast Maim and immediatly stop attacking.