Good tip is to put a value on your time. I like to use $25/hr, but since minimum wage is being upped to ~$15/hr everywhere due to Covid, I'm thinking of upping it to $35.Figure out what your time is worth.
Depending on your hourly worth, you will probably be better off putting in more hours working and cutting back on luxuries.
Some of the suggestions like gardening, changing your oil, etc. are great skills to develop, but may not be worth the time it would take you to do them vs pay for it.
I have a huge vegetable garden. We get a good amount of produce from it. I know financially, we would be ahead if I took the time spent gardening and put it in working. But I enjoy growing food for my family and having the kids out there helping. I like the security of having that skill.
I can change my own oil, but it's not worth my time. After figuring in the costs of all the materials and the time for me to do the work, I'm better off paying a quick change place to do it while I make phone calls, work on estimates, or send emails. Once my kids are old enough to take an interest in cars, that might change the equation enough for me to do it with them.
We rarely eat out. We don't drink much. Ditched cable a long time ago. We plan our meals weekly.
We try to shop by unit cost. That's the small number on the shelf price tag that tells you $/amount. Bulk is usually cheaper, but not always (especially if using coupons).
Drive like a granny. Go easy on the gas, leave room in front of you, and coast up to stops. Fewer tickets, fewer accidents, fewer repairs.