To be honest the biggest thing that helped me save was bring my lunch to work and having coffee at home or instant coffee. I know this is a popular tip, but it worked.
I was spending between $10-$15 per day on lunch and then on average $5 per day on coffee. Working 5 day’s per week and 48 weeks per year.
This was costing me between $3,600 and $4,800 per year. Once I realised that I would much rather have this invested (or even go on a holiday worth that) each year, it made it easier.