Here's a quick time saving coupon trick which works out well for me:
Say you need body wash, razors or toothpaste. And say you are already headed to Walmart to buy some groceries.
Click on this bookmarked link to see all the recent Walmart couponing hauls on youtube -- ignore ones several days old as the coupons expire fairly quickly.
https://www.youtube.com/results?search_query=walmart+couponing+haul&sp=CAI%253DYou'll get a list of recent youtube videos related to a Walmart coupon haul. In this video list are usually video thumbnails of their current hauls. If you say see the body wash, razors or toothpaste you need, click on video and see how they got it for free, or near free.
Just install Ibotta and Shopmium and that covers most of these deals. Between the two you often get stuff for free and they tell you how much it wil be in the video.. Just jump to the part of the video that has what you are interested in. Sometimes at the end of the video you can see the entire haul if it is not in the thumbnail.
I did this a couple days ago before going to Walmart. I knew we needed more body wash. I found a thumbnail that showed a lot of free body wash.. So i jumped the parts of the video that had the body wash. Within 5 minutes I had all the data I needed to do the haul. I clipped the coupons both in Ibotta and Shopmium .. scanned the body washes in store with both apps, to confirm both coupons work on each item.
I got $10 in body wash for free , save for sales tax of like 79 cents between the two. It took all of like 5 minutes at home to find the deal before heading to the store. So $10 saved in mins of work isn't bad at all. [EDIT: there was a small amount of time involved redeeming the coupon in each app as you have to scan the coupon in each app and for Shopmium scan the barcodes -- make sure you save the receipt from Walmart so you can scan it.]
I don't mess with CVS couponing or other couponing apps now besides Ibotta & Shopmium. I was obsessed with it a few months back but it was too time consuming.. I rather just do a quick search for what we curently need from Walmart.. find the deal in a few mins, and then go do it.
EDIT: Shopkick is another app that is worthy of installing. There are sometimes Walmart deals which take advantage of these coupons combined with Ibota and/or Shopmium. But for my last haul, both body washes were handled by only Ibotta/Shopmium apps.