Shoulders Back Posture

My posture has always been slumping my sholders forward. 

Now I am trying to develop better posture, with my shoulders held further back, rather than slumped forward.

Here are some exercises I am trying.

Hold a dumbell, 15 to 125 pounds, in each hand, at my side, arms extended.  Shrug shoulders backwrd and foreward, rolling up toward the middle, and rolling downward at the end positon.

I am thinking of incorporating on the backward roll, that I will stretch my shoulders further back, and raise the weights a couple of inches, to get the pectoral muscles in dynamic tension, and holding the shoulders backward with other sholder connecting muscles. 

Another excercise is with the cable flies at the top position, to bring the weight, set on the light sinde, from my neck down to my sternum, in front of me, hands together, then start spreading my hands as I bring my hends down to my side, and then do a shoulder shrug, with the weights more behind me, and bringing my shoulders as far back as possible.

I put the cable pulleys near the floor.  I stood with my back to the machine, pulled some light weight, with the cable pulleys slightly behind my back.  I shrugged my sholder, forward, and backward.  Fromteh backward positon, I pulled my fists upward a couple inches, and felt my shoulders tighten backward, and my pectoral muscles tighten on my chest.   

 Found an adjustable bench, leaning back, 30 degree, shrug my shoulders forward, and backward, fill my chest, pull my shoulder back and curl my arms upwrd, then back down.

Getting my neck to go back is another challenge.  I found an exercise, put the tips of my finger on my chin, and push backward.  My neck and head position go backward, and apparently I was not aware that my head was bent slightly forward.  Repead wht the Left, then the righ a few times.  Even whild walking, not really exercizing.. 

 Maybe I should search:

 posture exercises

Shoulder Posture

Slump Shoulder Exercises

.