I am not the best knitter at keeping my stranded colour work loose enough to not pucker so I decided to block the pieces before I sewed them up to get the pattern to lay nice and flat. It worked a treat.
I put a large bath towel on the floor under a radiator and pin the pieces onto it and the carpet. You can stretch the work to the correct size (if it contains wool). I then dampen another bath towel and put it flat over the pinned out work. Then wait until it's dry.
See the results below!
Happy knitting :-)