British Museum - Getting to grips with the BM

The cardinal rule is: don't try to see everything on one visit

Even if it were physically possible to do so, you'd end up with
nothing but glazed eyes, throbbing feet and only the haziest of
memories of anything you had seen. You should focus your attention on
specific areas of interest. If you're not sure what you want to see,
buy one of the excellent souvenir guides (?5) and take your pick of the
highlights, or try one of the four suggested tours on the ?1 leaflets.
Alternatively, book one of the 90-minute tours of the museum's top
treasures at the information desk (?7) or join one of the free 'Eye
Openers' tours, which concentrate on one aspect of the museum's
collections (such as 'Europe: Medieval to Modern' or 'Treasures of the
Islamic World').