I had a very useful and prompt reply from Micki on the Definitive Writers website, advising me "to stick with no more than 3 chapters of a book but that I can use as many snippets or one-two lines on twitter, blog sites and FB as teasers. She also writes excerpts of her book and keeps it to three paragraphs".
This is of great help to me and I will pass on this snippet of information to my fellow Writers Group members.
The kids are looking forward to seeing The Smurfs at the cinema today and playing with their good friends Sam and Olivia. Who knows, I may even post a review of this movie on the blog tomorrow!