Not using one is the best hack of them all. Plan your expenses and keep your credit card for emergencies and discounts. If you want to avail offers/discounts then use the credit card and immediately make the card payment. Don't wait for next month. People might not like this approach but trust me this is going to be much more sensible than offloading everything to your credit card
I don’t use a credit card but this is my fav YouTube channel right now by Zerodha https://youtube.com/@zero1byzerodha?si=2jrma67_VLflWZpp and they talk about similar stuff
I usually use it for online stuff and UPI payments which are necessary, the only cool hack right now is you can load money into CBDC from Rupay card and use it as Real virtual cash without any interest