Well, I work my pecs a lot and I'm wondering how I can work the upper part of the pec. I have pretty good pecs as it is but I can't see the distinct line that runs between the pecs all the way up to the collar bone, it gets about halfway there. Is there a certain work out for this? If it's something like an incline fly, which way should the incline be? Thanks!

incline for top decline for bottom

Collar bone muscle = the trapezius

Do a google search on trapezius workouts.

An example trapezius workout would be barbell/dumbell shrugs.

People who know about the trapezius and who ignore it anyway tend to do this, because a good amount of compound workouts already work the trapezius, but the trapezius needs more stimulation for the good growth.

Not working the trapezius at all can make your muscular outline around the collarbone look weak and wimpy.

EDIT - I seem to have misread your post, your looking for the upper pec, not the upper back. Nevermind this post then =).

That's ok, hehe, I was bit confused about that at first. Dude, the trapezius IS really sweet when you started building it. The true mark of someone buff is a good trapezius and big forearms. My brothers like it, they say I have a "no neck" haha.

upper chest = Pectoralis Clavicular worked out by incline benchpress

muscle connecting sternal chest to anterior deltoids = Pectoralis Minor workedout by chest dips

Collarbone muscle = Upper Trapezius worked out by shrugs

nah man pectoralis minor is worked in Incline too...