Cancel your current form and switch to caster:
/cancelform
You should make a macro for each form, so you can 'powershift' easily from one form to another with this:
#showtooltip
/cancelform
/cast Cat Form
It will switch from any form to caster without exposing yourself in caster form. Simply change Cat Form to whatever form you wish.
Cast Innervate on yourself:
/cast [target=player] Innervate
Buff your target with Thorns & Mark of the Wild
/castsequence reset=target Thorns, Mark of the Wild
Cast Nature's Swiftness and Healing Touch
/stopcasting
/cancelform
/cast Nature's Swiftness
/cast Healing Touch
Barskin & Hurricane (or Tranquility)
/stopmacro [channeling:Hurricane]
/castsequence reset=30/combat Barkskin, Hurricane
Equip healing weapon and idol when in caster form, and feral weapon or idol when in Bear
#showtooltip Dire Bear Form
/equip [stance:1/3] Gavel of Pure Light
/equip [stance:1/3] Vengeful Gladiator's Idol of Tenacity
/cast [nostance] Dire Bear Form
/cancelform
/equip [nostance] Earthwarden
/equip [nostance] Idol of the Wild
Or use this cool macro to switch different weapons for cat/bear (PvE):
/equip [stance:1] Terestian's Stranglestaff; [stance:3] Earthwarden
/cast [stance:1] Cat Form; [stance:3] Dire Bear Form
Use potion and healthstone while tanking
/cancelform
/use Master Healthstone
/use Super Healing Potion
/use Major Combat Healing Potion
/use Fel Blossom
/cast Dire Bear Form
Switch to Cat and cast Prowl
#show Prowl
/cancelform [nostance:3]
/cast [nostance] Cat Form; [stance:3,nostealth] Prowl
Charge an enemy and Growl. You can replace Growl with Bash, Mangle...
/cast Feral Charge
/stopcasting
/cast Growl
Cure poison & Remove Curse
/cast Cure Poison
/cast Remove Curse
Announce Rebirth in party chat (%t will say the name of your target). Change /p to /ra for raid chat or whatever:
/cancelform
/p Rebirth on %t
/cast Rebirth
You damn Night Elves can use this in arenas to drink:
/use Star's Tears
/cast Shadowmeld