1) Grocery Gadget - This is a free app I downloaded off of itunes for my iPhone. Get it (yes, it works for Androids too). You can sign up and access your grocery list either through the app or through the online portal when you're on your computer.
2) Weekly Circular - I shop for groceries primarily at Harris Teeter; I used to make a trip to Giant once a week too, but under detailed comparison found Harris Teeter to be superior as far as the price goes for all but maybe one or two items that I buy. Other than Harris Teeter, I only tend to shop for groceries at either Target or the local H-Mart (Korean grocery) -- but those stores only for specific items. 
3) Online Shopping Cart - I hate when the weekly circulars only tell you "buy one get one free"... that still doesn't tell me how good of a deal I'm getting. If I type the item into the shopping cart, I can find out for sure how much the non-sale price is and what the sale price is. It even provides the nutrition info so that I don't have to go searching around the internet to find and compare products.4) Coupon Binder - I was just putting all of my coupons into a little checkbook-sized folder, but I had a challenge remembering what was in there. After deciding to try the coupon binder approach -- which involves using baseball card protector sheets purchased on Amazon and organizing the coupons alphabetically-- I have gotten a lot better at actually making sure I use the coupons I have in conjunction with sales.
5) Wunderlist - This is another free app that helps me keep things organized and has an online version too. I have a whole "list" set up for grocery coupons; each item in the list specifies the product brand, specific item name, coupon amount, and I place the expiration date under the task "due date". As I build up a larger selection of coupons, this will help me keep them organized and also provides me with a quick list that I can look through to see if I have a coupon for a particular item. You just have to be good about updating the list when you use the coupons.Once a week when Harris Teeter sends me the weekly circular, I open items 1-3 and 5 in tabs on my browser. Starting from the circular, I create a grocery list from sale items that a) I actually need b) are a good price and ideally c) have a coupon to go with the sale. Sometimes they will try to be tricky and say "sale!" but the sale price is only 10¢ cheaper than the item would be regularly, so not exactly a great deal. I really try to keep this in mind and make a goal of saving at least as much as I spend. Although this doesn't always happen, I think it's a good goal to try and reach. If you can stock up on items when they are on sale, especially for shelf-stable items, it really helps to reduce the overall grocery expenditure. And once you get used to what kind of prices are good in general, you'll be in a much better place in the future for knowing when to buy and when not to.
For right now, my biggest weakness/problem when it comes to grocery shopping is making sure that I look around for coupons. There are a lot of websites available where you can print your own coupons, and I am really bad about doing that. I should also look at manufacturers' websites when I'm making up my list to see if they have coupons, too. Kashi and Seventh Generation are two brands that come to mind that usually have coupons available when I take the time to look.
