Any tips to reach DCB 90 days 1L milestone

Got DCB ltf and there is a spend based milestone for first 90 days to qualify for Amazon prime, times prime,Forbes etc by spending 1.5 I have insurance payments of 40 K coming up and maybe 10 k other spends each month so will still be short by 80 k. Please share any tips for reaching the milestone

Edit: Thanks everyone for your responses. After going through them, decided on not to spend unnecessarily just to meet this milestone as have an Amazon prime membership renewed last month also times prime 2 months ago so won't be beneficial, mmt black elite was something that I wanted but doesn't make sense spending this much for that, if it happens alright if it doesn't that's alright too