1. Don't go on Members' Evenings when there will be wine.
2. Don't wear new shoes that hurt your feet so much you have to put them in your handbag and scamper about bare-foot all night.*
3. Don't go with a friend who has Interesting Gossip which will distract you from the Old Things.
I went to see Afghanistan: Crossroads of the Ancient World at the British Museum the other night. However, I did not keep any of these things in mind and so can only tell you that there was a big, tinkly-jangly collapsible gold hat.
And that the floor's cold.
*This is actually okay as there was jazz and I think it's a life-rule that anywhere there's live jazz there will also be a girl wandering around without shoes on.