Couponing brings out my stubborness

Before I get to my Friday finals, I have a short story to share.  This past week, I left an entire cart of groceries at a store.  I'm not really proud of this fact.  I had written a long story to give all the details, but really, I think I just need help in keeping my cool when a cashier won't allow me to use coupons the way I think they should be used.

So, anyone have some suggestions for a girl who is very stubborn and gets highly frustrated when plans don't work out?  I would greatly appreciate them, because if I would have simply asked for a manager, I might have ended up with a good amount of items for a good price.  Please, let me know what tips you have for dealing with the little frustrations of couponing..

Moving on.  I did get some great deals at Publix and at Rite Aid this week.  Here's what I got.

Publix

1 Hunt's ketchup

2 Mahatma rice packets (money makers!!!)

1 Knorr Chicken flavored noodles packet

3 Mentos gum

2 Edy's shakes

1 gallon milk

1/4 of watermelon

1 bag of salad

2+ lbs of ground chuck (poor chuck)

2 boxes Toaster Streudel

1 roast

1 loaf of bread

2 Scrubbing bubbles bathroom cleaners

2 boxes of Ziploc sandwich bags

2 Kraft Homestyle macaroni bags (excited to try these out)

1 Publix aluminum foil

2 boxes Kellog's Special K cereal

Total before sales tax: 49.64

Total value of all goods: 80.72

Saved: 39%

Rite Aid

1 box Viactiv chews

1 package Uncle Ben's Ready Rice (money maker!!!)

1 Finesse shampoo

1 Finesse conditioner

1 Orbit gum

2 4-packs Gatorade

2 Tylenol Precise

1 box Tampax

Total before sales tax: 4.31
Total value of goods: 54.70
Saved: 92%
+Up Rewards earned: 5.50 and a 125 pt wellness shopping pass worth 10% off.
Also on receipt - do survey to receive $3 off $15.

All in all, I'd say I had two really great trips and one bad experience that was mostly negative because of my own impatience.  Looking forward to my next trips to Rite Aid and CVS because I have a good amount of +Up Rewards and ECBs now, too.