Not eating bread, cereal, or sugar had a big impact for me. I haven’t gone full keto but I’ve found just doing that is sufficiently challenging and effective for long term weight loss. Especially once you hit 30 it’s should be something you start drilling into your head and simply stop buying it.

Replacing sugar with Erythritol and monk fruit has been more than sufficient replacement for things like coffee and small treats. It’s hard to find commercial products with Erythritol which is a shame but that seems to be slowly changing.

Sadly most “sugar free” products have Maltodextrin or Xylitol which is awful for me as I have colitis and I’ve read they aren’t keto friendly. If every product that contained those two switched to the former two my life shopping for groceries would be so much easier.

I also don’t go hard at restaurants (nothing worse than having to be picky at a restaurant) mostly for practicality reasons but that would be the 2nd area I'd focus on next if I started to care more.

Starting small and simple (ie just no bread) at the beginning is the best way. Abrupt changes usually have A abrupt endings as you significantly increase the workload.