Well, every average eventuality. The 18-55mm zoom will be pretty useless when the world's only surviving Dodo (who knew?) waddles by a couple of hundred yards away.....the point I'm making is there is no such thing as a walkabout lens.
Images don't leap out at us randomly and make instant great pictures. Images need to be planned and worked on, even if it's just a plan to do something or go somewhere with intent to photograph. Do something might be book a studio and get a model. Go somewhere might be plan a day of candids at Blists Hill. Projects are also great ways to focus our talents. The one I suggested last year was "Project Red" - go and shoot 12 pictures in one hour, and every picture should have red as a component.
So plan, don't hope, and great pictures should result. Having said that, we arrived in Llandudno last year and found the Tardis there, with a girl in hotpants and a man blowing fire out of a tuba. Thank heavens I had my compact camera with me.....
