I was buying something from Amazon and did a Google search to see if I could get cashback on Quidco etc. No cashback available but I've just seen you can shop via this link and it will generate a 5% donation to RNLI, a really great cause.
Edit: oUkTuRkEyIII has pointed out this has been posted before and applies to lots of charities, not just RNLI. I've edited the post to signpost to the recent post to maybe highlight to others that missed it just like I did.
Credit to FlameBuster