Well, I finally got to pay $665 for a month's supply of a drug.

[Ms. Toad]

43. You just go to the website, price check your medication, print the coupon, and take it to the store.

The only thing beyond that you need to understand is that if you are using lots of medications and have a relatively low out of pocket cap, you may be costing yourself in the long run because meds bought without insurance don't count toward that cap.

I'll never hit the cap (my spend is $1-200/year. So if GoodRx (or Costco) is cheaper I buy there.
My spouse is taking so many meds that she'll hit the $2100 cap (after which all meds are free to her). So it doesn't matter that GoodRx is cheaper - she only has to pay $2100 under insurance, so buying GoodRx actually costs money (since she is paying that on top of the $2100)