Getting up at 06:30 and working 08:00 to 16:30 isn't something I'm used to. So the past few days I've been rather tired sitting at my desk. The humidity of the office not being particularly helpful. After nearly nodding off during a presentation, I decided that it was time to find some way of keeping myself alert. Now I don't drink tea or coffee, but they provide free bottled soft drinks here in the office. So I grabbed a coke, took the cap off and went back to my desk. Not long after, I was sharp and alert, whereas before I'd almost been struggling to stay awake. Suddenly I appreciate why coffee is so popular.