How would you live a "boring" life for a few months to build up savings?

Half of 2026 has passed, and apart from some necessary extra expenses, I feel that there has been quite some lifestyle inflation for me that has resulted in me growing my savings by only about 1500€ over these 6 months. And more than 500 of it came from stocks growing anyway. Not only have I taken (past and upcoming in August) about 25 days of holidays in total, I have also splurged a bit on experiences and nice things, apart from going out etc. After my holiday in August, I'd like to return to