1. Go to stash and see what I've got.
2. Choose some DK rainbow colours, the largest balls I could find.
3. Decide to make a rainbow blanket.
4. Look up patterns and crib a few ideas.
5. Try out 100 stitches and find it is too long.
6. Worry about running out of wool and ending up with a strip rather than a blanket.
7. Realise I've made a mistake in the pattern and increased by one 'bobble' each row.
8. Pull it all back and try again.
9. Cast on 75 stitches and quite happy that the wool will last out but will make it stretch by adding some white in between.
10. I'm on my way. This blanket is one row double crochet UK, 1 row in colour bobble or popcorn stitch, 1 row in colour double crochet, 1 row in colour bobble. Repeat with next colour. I've done red and orange and now I'm on yellow. The bobble rows take longer than the DC rows but it is growing.
I don't know how big the blanket will be - it just depends on the yarn I've chosen. There's planning for you!