I start off with good old fashion upright rows..... thickens my traps and works the hell out of my posterior delts.... Next, I hit the behind-the-neck press because they really attack the median and anterior heads of the deltoids..... thats them...... I do other exercises too; however, these are my two favorite ones!!!!!
I love doing arnold presses then doing upright rows. Another good thing I've found to blast your delts is this
Lean on a high incline 80 degree or so, then lift your arms straight to the sides, swing foward, lower, raise in front again, swing to the side and lower. Thats one rep 4x8 and you'll be nice and tired
They're similar to regular db press except you start with the db at chest level palms facing you{like you're doing curls} and rotate your palms away from you as you press the db up, ending like regular db press, and return to starting point. Kind of hard to explain. they're great for your shoulders .
dbells always. the straight bar puts mad stress on my lower back. with dbells i can keep a pretty straight spine and dont have to lean my head back to let the bar pass. and no, i will never do behind the neck presses, thats even worse.