I can be extremely over-cautious when it comes to the contents of my bag - part of my 'prepare for every situation' mentality - but these days I'm more of a simple gal, especially when it comes to smaller bags where you don't really have the space to fuss.
Sometimes I read other peoples' 'What's in my bag?' features and I just think No way do you carry some of that stuff around! ...Seven shades of lip gloss?! - so I'm personally going to be as realistic as I can for this.
Also: Hairclips - an absolute must for my Medusa-eque do / Earphones / Mini deodorant/body spray - not so relevant for today (rain!!), but the past few weeks have been BOILING and there's nothing wrong with a little preparation for when the sun is sweltering you! / Keys / Snacks - usually these (they're delicious and taste like sweets except are 100% fruit!) or something more a bit more naughty and/or chocolatey! Some say it's bad to carry food around with you but
I'm sure I've forgotten something but there you go. No doubt a uni edition will be coming in Sept/Oct in preparation for my new term!