Still on the fence about taking advantage of some of the highest ever welcome bonuses (OFFER EXPIRED — SEE CURRENT OFFER) we’ve seen for Delta American Express cards? Can’t think of how you’ll meet the minimum spend in just three months? Don’t worry. We’re here to brainstorm! There are plenty of ways to meet your minimum spend requirements in the next three months. Remember this very important rule: never buy something you wouldn’t normally purchase or go over your budget. Interest fees could easily negate the points you earn. Also, keep in mind that your minimum spend period begins the day your card application is approved, not the day you receive or activate your card. If your card application is instantly approved, Amex generally provides you a card number, expiration date, and CVV you can use to start shopping online right away. Make sure to take advantage of that! All…