Yes, I'm harsh on Delta's award program. But I'll admit that it's getting a bit better. They are running a few promos right now that could get you a decent boost in points. These promos aren't for everyone, but if you are already collecting Delta miles, then these might make sense for you:
1) You can earn Delta miles on every Lyft ride you take just by linking your accounts: https://www.deltalyft.com/
2) Register for this promo to earn 50% bonus miles through 9/30/18 on any miles earned through Delta's partners (hotels, Airbnb, rental cars, dining program, and the Delta shopping portal): https://www.delta.com/mypromos/acelanding.action?offer=PartnerDaysofDeals
Have a great week!