How can I get better?

[:1]I know it's a bit late in the expansion to be asking for advice, but why not. Just by looking at my armory, does anyone know if there's anything i can do to bring my dps up a little bit? It's not bad right now (usually in top 3 or 4 in raids) but i feel like i could be doing better.
I'm going to assume your main spec is Arcane PvE.

Gems:
Red Socket, Prismatic Socket (belt buckle) or Blue/Yellow socket with a useless bonus: 20 int
Yellow Socket with a useful bonus: 10 int 10 haste
Blue Socket with a useful bonus: 10 int 10 hit

Enchants: (I'll only list the ones you don't already have)
Chest: 10 stats
Feet: Tuskarr's Vitality if you need to mobility (you don't have Imp. Blink so you probably do), or Icewalker if you don't.

Trinkets: (This is a slightly educated guess, there's no currently working sim and I'm too lazy to do the maths myself)
Ditch the Quill, use reforging to turn less useful stats like spirit or crit into hit if you need to after using 10 int, 10 hit gems. Pick up a trinket like Abyssal Rune, eventually replacing it with something better from a raid (DFO, Spyglass, RotD).

Rotation: Use the rotation detailed in EJ's Arcane Thread (Burn, Regen, Conserve) when the boss is going to last longer than you can sit there spamming AB for.

Thank you very much! The gem tips were very helpful. Cleared some stuff up, thanks again.
You also only need 17% Hit

I'm going to assume your main spec is Arcane PvE.

Gems:
Red Socket, Prismatic Socket (belt buckle) or Blue/Yellow socket with a useless bonus: 20 int
Yellow Socket with a useful bonus: 10 int 10 haste
Blue Socket with a useful bonus: 10 int 10 hit

Enchants: (I'll only list the ones you don't already have)
Chest: 10 stats
Feet: Tuskarr's Vitality if you need to mobility (you don't have Imp. Blink so you probably do), or Icewalker if you don't.

Trinkets: (This is a slightly educated guess, there's no currently working sim and I'm too lazy to do the maths myself)
Ditch the Quill, use reforging to turn less useful stats like spirit or crit into hit if you need to after using 10 int, 10 hit gems. Pick up a trinket like Abyssal Rune, eventually replacing it with something better from a raid (DFO, Spyglass, RotD).

Rotation: Use the rotation detailed in EJ's Arcane Thread (Burn, Regen, Conserve) when the boss is going to last longer than you can sit there spamming AB for.

I was going to type that but he saved me the trouble :P