Saving Money vs Saving Time

I am still relatively new to the couponing game. And the temptation upon first starting is definately to clip every coupon available and to look for all the deals. That isn't always practical. Is it practical to go to every drug store for their deal of the week---especially when some place like Publix accepts competitor coupons? But then, is it the best use of your money to shop at only one place and just take the deals that they have this week and spend a little extra money on the rest?
Additionally, what is actually "organized" when it comes to couponing? Is oraganizing and compiling a notebook full of coupons time efficient? Or is it better to just break them up in catergories and go from there? Either way, aren't you digging through something at the check-out counter to pull out your coupons? What is orgainzed when it comes to hundreds of tiny pieces of paper?
Then, are you willing to "fervantly discuss" a deal with an employee, or do you let it go when they don't ring you up right? Does it depend on the deal? Does it depend on the amount of money you're now having to spend because of their mistake or misunderstanding?
Finally, how does all of this affect your testimony as a Christan? Or does it?

I guess all of this is to say that I am still trying to find a balance. I'm picking a couple stores to hit each week, and I'm trying to plan my menu around what's on sale.  I worry about being healthy, but can only do so much within a budget, so I'm picking and choosing the most important things.
As for organization, I'm breaking things down into catergories and then pulling specific coupons for the store I'm visiting before I get there. Anything else gets dug through at the counter. And when someone messes up my bill, if a simple inquiry doesn't improve the situation, I let it go. More often than not, it costs me extra money.
Finally, I do hope that my being a Christian is something they notice. And if they have and I've argued with them, I feel that I've ruined an oportunity. The employees of the stores I visit most often are getting to know me, and I think I may have an opportunity some day to talk to them about church or salvation. I'm always cautious about jeopardizing that.
So what are you doing? What do you think?