Might want to start looking at some of the credit card offers again as the companies seem to be raising the bonus to join. The Delta Platinum AMEX card offer is 100,000 miles now and also offers first checked bag free plus a free domestic companion ticket per year free. Cost is $250 annually.
Have had good results with the Chase Platinum Reserve card - the points from it are going to cover our summer domestic airfare and the rental car (2 weeks of the rental car was twice as expensive as all the airline tickets combined - rental car fees are exorbitantly high right now - BOOK EARLY).
Also, a reminder for the AMEX Blue Cash preferred. You get 6% back on groceries up to a maximum of $360 per year. Fee is $95 annually. Left alone, it can add up over the years.