What are some of the marketing strategies that is working for you in Post CoVID world?

As a marketer i've found the CAC is going high and LTV of customers is becoming short, In a B2B context some channels like LinkedIN has become click baits and sending huge clicks with very less conversion. This has led to re-think the marketing approach by being agile and changing it often. However this haven't proved to be a good solution as warming up of the target customers isn't happening as we are forced to change the approach every now and then! So what are some of the best marketing strategies that worked for you and why you say so?