How do you praise continually? It sounds impossible until you notice what is actually being asked for.
It is not a permanent feeling of joy. It is a life that keeps making a certain kind of confession about who God is. That can happen in a ten-second sentence at the sink, in a song in the car, in one deliberate word of thanks before you open your laptop.
None of it is impressive on its own. What makes a life of praise is not intensity but frequency. It is the habit of returning to the same true facts until the returning becomes automatic. So do not wait for a feeling worth worshipping with. Offer the small one now. Continually simply means often, on ordinary days, for as long as you have them.