If you're going to make an online purchase google (or some other search engine) for a coupon code. Often there are free shipping or %age discounts available.
If you're going to make a brick and mortar store purchase also google (or some other search engine) for a printable coupon or mobile phone coupon.
I just type in the name of the store and either "coupon code" or "printable coupon".
There are a number of coupon code sites, some better than others, and you'll find the ones that carry the best codes for the items you're looking for after a little trial and error.
