Here's what I do:
Don't smoke.
Drink very little, maybe five units / week.
Only eat out or get a takeaway a couple of times a month
Buy my raw meat, fish and non-perishable food in bulk at Costco (very cheap compares to Tesco / ASDA etc) and freeze it, only using the supermarket for perishables, dairy etc. Don't buy ready meals.
Don't routinely go on holiday every year.
Have buttered toast for breakfast and make porridge in the microwave at work for lunch (rather than spending a couple of quid a day on a sandwich / pasty - very easy to spend fifty quid a month just on lunches)
Don't pay into a pension, because that's just a big bet that I'll live to retirement.
Don't have life insurance, accident / sickness / unemployment insurance, credit card payment protection insurance, mobile phone insurance. The only insurances I have are buildings, contents and motor.
Do some of the work on my cars myself.
Do as much decorating and other household maintenance myself as I can, within the limits of not being qualified to self-certify under part P or gas safe registered.
Keep the same car for a long time - current one was bought in 2004, still no intention of changing it.
Mortgage on base+0.24% lifetime tracker.
My sofa cost £300 from some mail order place in Wales a decade ago, my other sitting room chairs were my parents' old ones (20+ years) that they were going to chuck out.
and so on ...
With the camera stuff I keep my eye out for bargains on new and buy a lot of things
second hand.