I am a convert. I have discovered blocking, thanks to YouTube. I have made a couple of boards – one large, one small, and with the convenience of a spare room, can block in the evening and see the results in the morning.
I first used the blocking board when I made the knitted felt coasters (see my previous post). I now find it invaluable for straightening out my granny squares (posts to follow). If you look carefully at the photo of the granny squares you can see that I even used some marked tracing paper as a guide to stretch the square to the desired size.