Didn't notice anything dedicated to this so thought I'd start a topic for frugality/money saving tips:
NUMBER ONE: ALWAYS CHECK DDMS!
(For things you need and are buying anyway)
Shop around every year or 2 (Auto insurance is usually an easy one, generally creeps up and companies often give new clients great rates)
Check your bills
1. recently noticed a fee for "home services" on my gas bill - apparently I was being billed for a service contract that didn't offer much value to me b/c the previous homeowner had it - 20 minute phone call had it removed and stopped paying ~$25/month for it
2. Make sure you aren't getting billed twice for the same service - streaming services/subscriptions/etc.
Set meal plans for the week and only buy those necessary items - avoid buying extra unneeded items in grocery.
Do your own haircuts
Use Beis Medrash/Library instead of buying sforim/books (or local secondhand shop for sforim/books you'd want on hand at home always)
@mods If there's an existing or better thread please merge. I tried searching for this topic with tips from Wiki in Help me find it - searched frugal/tips/save but couldn't find a good thread. Best possible alternative I saw was this:
https://forums.dansdeals.com/index.php?topic=117308.0