On my way home on Friday night I was reminding myself that I only had to remember one thing this weekend. At some point I needed to pop down to Balham station and get a new monthly ticket as mine had run out. It would save me from the carnage that is the ticket office on a Monday morning (and the first monday of the month to boot).
Can you guess what happens next? From the length of the queue this morning it would have taken somewhere between twenty minutes and half an hour to get served. So I took the quick route of only queueing for five minutes at the ticket machine to get a daily return.
This means that all I need to do is remember to get a new monthly pass on my way home tonight. Which is guaranteed, honest.