Any tips/stretchs/routines for increasing this?

Its something i really need to work on, especially to help with my squatting and i want to add some to my training.

OH squats/ shoulder dislocations.

Hold a bar overhead in a snatch grip and work on getting the bar further behind you head with elbows locked. Are you sure it's shoulder/tricep inflexibility? I think chest/lat tightness is a more likely problem.

I DO a shoudler strech from a high cable so the cable is behind me. Really stretches the shoulder

I have to say I think shoulder dislocations are an accident waiting to happen....especially if someone has a pre-existing shoulder problem

ITS a DC strech from Dave Henrys dvd. The back strech and the shoulder strech are really helping me

Shoulder 'dislocations' are a classic stretch to help with shoulder inflexibility for squatting - In fact of course the idea isn't to dislocate your shoulder but to stretch so Galt's descriprion of going gradually back is the right thought.

I find the best thing is to start with a very wide grip as then you can go all the way back and then bring at back forwards - Do this a few times and then take a slightly narrower grip and repeat adn keep narrowing gradually until you find the point where you can't get all the way back round - Then hold it at the stick point to stretch.

I'd also advise pec stretches too - ie in the doorway stretch, arm on the wall stretch etc

That reminds me - I should be doing these now my shoulder's almost back to normal
Mind you I don't seem to have too much problems with shoulders on the squat - It's my wrists that hurt

Like Ader says dislocates are good for shoulder mobility. & stretching the pec minor will improve scapula retraction.

Often its not just a matter of flexibility but postural issues. I would try the following:

1. Work on thoracic mobility, I find foam roller work really good for this - some self myofascial release & thoracic mobilisation. Quite a helpful article here:
http://stronglifts.com/how-to-improve-y ... -mobility/

2. work on improving scapula retraction & depression - face pulls, scapation with shrug / OH shrugs / scap pushups / prone Ys. Good article here:
http://www.t-nation.com/free_online_art ... and_shrugs
Face pulls: http://uk.youtube.com/watch?v=kexr7CqnV ... re=related

3. Do some RC work, especially strengthening upward & external rotation - cuban rotations & external rotations.
Plenty of good stuff here:
http://uk.youtube.com/watch?v=A0ONHZmsF ... re=related

As for the triceps there are plenty of standard stretches, but I find a good one is to put the bar in the rack with some weight on it at the level you would do fronts with it. Then, keeping it in the rack, clean grip it & thenwork on pushing one elbow at a time as high as you can.

Thoracic mobility is key, trying to get a mobile glenohumeral joint with a kyphotic posture is not likely to happen.

Soft tissue work for the pecs, lats and smaller internal rotators prior to mobility and activation work for the rhomboids, lower traps and external rotators.

I like weighted stretching for the triceps as they can resist a lot of force, doing it without a weight or resistance can be futile.

Some good instruction for work on increasing thoracic mobility here. Click on pics to see vids.

Performing the various broomstick stretches for the internal & external rotators might be a good idea too.