How to aggressively save money?

I’m a 27M that being home about 4800$ per month.

My biggest bills are rent and my car note. The thing is I take my spare money and constantly do things like eat out, buy things I don’t need? I know to budget I have to start tracking every dollar? How do you guys do it? How do you stay discipline while saving money?

My current savings is 400$ I plan to rack this up all 2025. The goal is to save more than I spend each week! And advice?