Dude this is a forum on lifting not talking shit.
You have much to learn about this place!
Upright rows, reverse flyes and one arm DB rows will get the job done. you cannot isolate the rear delts per se, but if you focus on squeezing just your rear delts during these exercises it will help.
Power/Hang cleans work wonders, you will never see an Olympic lifter with small delts.
Also, pause at the peak contraction of each rep and hold for a second. if you can do one arm DB rows with a pause at the top, your delts will grow like no tomorrow.
Practice flexing and controlling your individual muscles often, this is one aspect people seem to over look. you should be able to cramp up muscles by focusing on them just when flexing. when you can do that, you will benefit more from training.
Pretty basic advice, but i'm not sure how long you have been lifting, so i just added some pointers.