I have changed a lot of things, although the changes aren't actually necessary at the moment - but I'm fearful for the future. As a self employed market researcher, I don't know if clients are going to carry on commissioning research, or if this is one of the first things that they will cut.
And DH works for a division of RBS, that they are trying to sell, (which has been going on for a fair while now), so he is also not entirely sure about his future. And as we're older (49 and 50) than many on this board we also have to consider how employable we might be.
I have stopped shopping online with Ocado. They introduced a delivery fee and, when I realised that my weekly shop was easily reaching £200 I decided it was time to stop. I now meal plan and have gone back to Sainsbury (no Lidl/Aldi/Netto convenient to me otherwise I would be going there!). I am experimenting with Basics foods, and am (mostly) very impressed with the quality. Today I bought Basics salmon fillets - the same as the TAste the Difference ones in every way except that the sizes of the pieces are more random. Responsibly sourced and RSPCA freedom food - but £1.50 cheaper per pack.
We eat more vegetarian meals and when I buy meat I stick to cheaper (but still tasty) cuts. I used to regularly buy free range chicken breasts, pork fillet and fillet steak, but that's a real rarity these days.
I try not to nip out for a few bits and pieces - which always ends up costing another £30!
My weekly shop is now usually around £40-50 cheaper than it was - although occasionally I splurge on various impulse bits.
Things we haven't changed - Friday night is takeaway night, and we go out for dinner on Sunday evening.