Spoon

A spoon was a device used both as a cooking or eating utensil, (TV: The Eleventh Hour et al) and as a musical instrument. (TV: Time and the Rani) It has found some other strange uses, as well.

As a utensil
On Earth, as well as other planets, spoons were used for cooking, (TV: The Lodger) and eating food, especially soup. (TV: The Eleventh Hour, A Christmas Carol)

The Androgums used a type of spoon called a boomerang spoon for their cooking. (PROSE: Storm Harvest)

As a musical instrument
The Seventh Doctor, early on in his incarnation, showed a knack for playing the spoons as a musical instrument, though this was seen less as he matured. (TV: Time and the Rani, PROSE: Strange England)

Representing Earth in lieu of Nicky Newman, he won the 309th Intergalactic Song Contest by playing the spoons. (AUDIO: Bang-Bang-A-Boom!)

During their encounter on Perfugium in the far future, the Eternal Death noted that the Doctor stopped playing the spoons and mangling his proverbs after his personality began to darken. (AUDIO: Master)

Other
In 1471, One-Armed Clarrie supposedly fought off twenty Lancastrians with only a spoon in the Battle of Tweksbury. (AUDIO: The Kingmaker)

A spoon was used once again as a weapon when the Tenth Doctor destroyed Baltazar's ship with a metal-eating fungus on a spoon.

The Tenth Doctor again used a spoon to send an Morse code SOS message when he got trapped in a data core room on the planet Hurala. (PROSE: Prisoner of the Daleks)

The Third Doctor once made a time flow analogue from a Moroccan burgundy bottle, spoons, forks, corks, key rings, tea leaves and a mug. (TV: The Time Monster)

Spoon-like objects
Among objects that resembled a spoon were:
 * An anti-Droon audio paddle, a pest control device.