Most successful thing you've cut to save?

[xXInfectedXx]

I disabled the contactless feature on my debit card - contactless has been the most successful thing I've cut to save because "it's just swipe and go", with contactless I ended up 80-100 pound a week on takeways and on luxury items. I've also packed my own food from home and not purchased food when out and about, this has made my weekly spend cheaper.