There used to be a really great addon called LuckyCharms:
It provided you with a bar that had all of the raid target icons for easier and quicker marking. Unfortunately, that addon is long gone so I've done the next best thing.
Simply unzip the attachment into your interface folder (such that you end up with World of Warcraft > Interface > Icons), and in your in-game macro menu you'll notice 8 new icons (4 of them are at the end, and the other 4 are in the middle between warrior and mage icons). Using these icons, you can create macros (about that below) for quick raid marking. Instead of looking for icons that kinda resemble the respective raid target icons
like Squirrelnut (F1-F8 binds next to minimap) =P. The macro can then be dragged to your bar like such:
The macro:
Code:
/script SetRaidTarget("target",n); Where the underscored "
n" is substituted with
Code:
1 = Star
2 = Circle
3 = Diamond
4 = Triangle
5 = Moon
6 = Square
7 = X
8 = Skull
NOTE: You may experience a bug where it seems as though you cannot drag the button form the macro menu. Just continue dragging (even though the icon will not appear under your curser), and when you release above a button slot the macro will appear there.
Also, I don't know if something similar has bee uploaded, if so feel free to delete.
Enjoy