<prompt> Human: More and more I see these credit cards with rewards or cash back offers. Are they worth it? Im good with money but never liked credit cards. I had a bank credit card to build credit when i was younger but when i got approved for a house I just let it expire and have no need for one. Thanks in advance!Assistant: I do a lot of online shopping and spend a lot of money in general on just a debit card. So.. heres a follow up question. I dont travel ever. If i do its one cheap airline ticket to Michigan and back. So whats the best card for me?Human: Amazon has its own visa rewards card thats 3 back on Amazon purchases, 2 at restaurants and gas stations, 1 everywhere else. If you shop online a lot it seems like a great option. I use it to earn points on my regular purchases online and others and then use the points I accumulate to buy gifts for Christmasbirthdays on Amazon. Assistant: I do use amazon for roughly 75 of my basic purchases so this might be just what i need!  <response>: Unless youre really sure about Amazon, I also recommend a flat 2 cashback card like the Citi Double Cash. Depending on your spending habits, there are also cards that may pay off more e.g. 5 back on gas up to __ per year. Also check out rchurning for examples of wise use of credit card rewards. 