I would think you could reduce it a fair bit, but not sure of the percentages.
Get a wee notebook and write down every cent you spend for a month and I mean every cent be it for a newpaper, cup of coffee or something bigger.
I cut out things like buying newspapers as it was just a habit and I never got around to reading them - just used them for the puzzles so bought a book of those instead. Find the best deals for around the house with regard to TV - cable or satelite, phone provider etc. based on your needs. Some prices have gone way up like hairdressing. My local place put up prices by 22% last year so I found another and better place in a town about 10 miles away (I live in a village) - they were half the new price. The town has all the big stores so I incorpoate it into a half day trip there and get all my shopping done too.
When you are buying things ask yourself do you need it or do you just want it for the sake of buying something.
I use the extra money I save on these unwanted and unneccessary things on more holidays in the year and spa weekends away.
Good luck.