Heh, great minds think alike. From my D&D new feats page:
Aimed Shot [General, Fighter]
You can maximise your chances of scoring a single-shot hit with a ranged weapon.
Prerequisites: Base attack bonus +6, Point-Blank Shot.
Benefit: As a full-round action, you can make a single ranged attack (but not a ranged touch attack) as an aimed shot. You gain an insight bonus to your attack roll equal to 3 + one-fifth your base attack bonus. You suffer a –4 dodge penalty to AC until the start of your next turn.
Touch attacks don't benefit from this action because a large part of it lies in targeting weak points in an opponent's armour, which touch attacks bypass automatically.
Normal: As a full-round action, a character without this feat can give up all her attacks to make one ranged attack (but not a ranged touch attack) at a +2 insight bonus. She suffers a –4 dodge penalty to her AC until the start of her next turn. A character making such an attack loses any spells she is maintaining, and any touch spells she has in hand.
Improved All-Out Attack [General, Fighter]
You are experienced at making furious attacks in melee.
Prerequisites: Base attack bonus +6.
Benefit: As a full-round action, you can make a single melee attack (but not a melee touch attack) at your normal attack bonus. You gain a bonus to your attack roll equal to 3 + one-fifth your base attack bonus. You suffer a –4 dodge penalty to AC until the start of your next turn.
Touch attacks don't benefit from this action because much of the benefit lies in battering through a target's armour, which touch attacks bypass automatically.
Normal: As a full-round action, a character without this feat can give up all her normal attacks to make one melee attack (but not a melee touch attack) with a +2 bonus. She suffers a –4 dodge penalty to her AC until the start of her next turn.
A character who makes an all-out attack can't use the defensive fighting option, the Expertise feat or any skill or ability that requires patience or concentration. She loses any spells she is maintaining, and any touch spells she has in hand. Spells and effects that nullify strong emotions (such as calm emotions) prevent those affected from making all-out attacks.
Special: A charge or partial charge is a form of all-out attack that channels your momentum into your blow. The bonuses and penalties from a charge or partial charge don’t stack with those from an all-out attack.
Special: A barbarian while raging is effectively making all-out attacks each round. The effective bonuses and penalties from raging overlap (don’t stack) with those from an all-out attack or an improved all-out attack.
I added in the option for characters without these feats to do something similar, because I couldn't think of any reason why they shouldn't be able to do so. It's not like taking careful aim is such an obscure tactic. And besides, it's good to give characters without iterative attacks something to do with a full attack action.
