go to the Victoria's secret website and sign up for emails. They don't send that many, but they will send you various coupons via both email and snail mail. You're supposed to create a separate email for all the spam stuff, but I'm too lazy. Bath and Body works is also good about sending out coupons and stuff. And if you're shopping and they ask for your phone number, give it to them. They won't call your phone, but they will use it for an address to send promos too.
If you know you'll be shopping somewhere, always check retailmenot.com first. They have both online and printable coupons for various stores.
Always look at your receipts. A lot of stores now have coupons or surveys. Cheesecake Factory had on their receipt a survey online and if you filled it out, they send you a $10 gift card.
Slickdeals.net has a freebies section. People always post their coupons and freebies on there. You don't have to join; I never have. I just read what they have and click and I get my stuff. Under Hot Deals is where I get the best bargains---its like the Dis Budget Board on steroids! Its where I got my $10 air tickets and concert tickets.
Do you do Target? Sign up for their text coupons. They'll text you when they have new coupons on their website (you have to be signed up with them), you go to the website and print them up. They've had some really good coupons lately too. Its target.com/coupons