This Build is still under Construction, Item tips are welcome.

As you see this is my first build and I hope you like it.

Caitlyn is a pretty cool DPS Ranged Carry and not afraid of Enemy tanks.

With this build you should be able to do around 900 Damage with one single Attack as you insta crit all the time (that's what I do acctually, Don't know how tho).

Headshot

This passive is a great tool. It can help you get both red and blue buff faster by standing in the grass as you try them. Along with that, it works as an excellent harass tool, especially early game, considering how large her auto attack range is.

Some headshot tips:

Always shoot neutral camps from a bush nearby if it's available.
Early game this is a great harass tool. Stay in the brush and (hopefully) last hit 3 minions. Pop out and last hit one more, and your headshot will be charged to hit a champion.

Piltover Peacemaker

Another great ranged tool for Caitlyn. This shot reaches a very long range, and does some respectable damage, especially early game. Try get it to it a champion first, so the damage doesn't get reduced too much. But if you can't, don't worry, this still does some decent damage even when it's reduced.

Tips for Piltover Peacemaker

This works really well to KS any buff the enemy is trying if you have the sight to do it. I can't explain enough how incredibly beneficial it is to ks the dragon from the enemy team, or steal their red buff.
This move can catch runners really well, considering its long range.
The Peacemaker can cause enemies to be very wary of your positioning. Use that as an advantage, and force them to juke the shot into a bad situation.

Yordle Snap Trap

These things are GREAT. They immobilize enemies, and thus are AMAZING CC in teamfights. Do note though, that these aren't stealthed like teemo's mushrooms. Put the traps in bushes where enemies would normally walk, so they'll be harder to avoid. You can also put them in the narrow parts of the jungle or ramp, in order to limit the way the enemy can move.

90 Caliber Net

The utility on this thing is through the roof. Use it to blink toward a runner, use it to move through short walls and narrow jungle walls, use it to slow an enemy champ chasing you, use it to juke out of skillshots and AoE ults like Nunu's. There are so many places you can use this, it's not funny.

Tips for 90 Caliber Net

You can hop over short walls and through narrow jungle walls with this.
If anyone is chasing you, USE THIS BEFORE PLACING A YORDLE IN THEIR PATH. Yordle takes a small animation time to place, and you can get stunned if you use it first.
If an enemy champion is running, and there is a tall wall or a jungle wall too big to pass through near you, you can shoot the net with your back to the wall in order to slow them.

Ace in the Hole

This ult is great for catching runners if you have the sight. Does some decent damage.

Tips for Ace in the Hole

Use this on people who are running away. Once channeling, they cannot escape.
In teamfights, using this on a low HP squishy can cause the tank to have to move in front of the bullet. If you position the ult shot right, this can cause some positioning problems for their team in the fight.
Be very careful when using this while enemies are around. The channeling time leaves you a sitting duck.

(stolen from TheWorldAsunder all credits to this belong to him. If you don't want this to be standing here, please tell me and I will write my own)

Summoner Spells:

I mostly Usein Combination of, as it gives you a great advantage of the enemy slowed and your speed boost, or it's excellent to run away with it.

Optional Spells are:

I will be adding more as I continue to play Caitlyn as my Main Character and add some more tips N' tricks and also make this Guide more Eye Candy when I figure out how to place things in the middle and such.

Also I will keep this build up to date with every Item patch RIOT does