Decrease at the beginning of the row, at the right side edge as the row is facing you or decrease at the end of the row, at the left side edge as the row faces you. Just make sure you don't miss a "decrease at each end" of a row. That's an easy one to skip over.
You'll have to see which way you would prefer the decrease to slant, to the right (k2tog) or to the left (ssk).
And yes, that's the way you would decrease every 4th row.
I hope you'll post a photo of the finished bear. It'd be fun to see it. Good luck with the pattern!