Incase sleeve
On the subject of consumables, I recently picked up an Incase neoprene sleeve for my laptop. These are available all over the place in varying sizes, and are a handy alternative to a specific laptop case. I can now get my notebook in my NNDR conference satchel, or any other bag, with or without a tonne of papers, it can be carried more covertly on the train, and it makes me long for the time when the surf starts to improve come autumn. Marvellous.