I say one of these three:
Sonic Screwdriver, it can take apart almost anything or lock it shut, useful for taking out locks on anything from vault doors to microwaves to tvs to the Cyber Men.
the spanner! just because we've been talking about those.
A portable computer was a complete fantasy twenty years ago.
Having problems with Windows? Or perhaps girl/boyfriend? Car won't start when you're already late for work? Got mugged in the street? Here's the solution!
Fixes virtually anything!
Come on. We all know what the best tool is. Why does someone not say it.
ps a good joke.....
The Harley-Davidson Facts
The inventor of the Harley-Davidson motorcycle, Arthur Davidson, died and went to heaven.
At the gates, St. Peter told Arthur, 'Since you've been such a good man and your motorcycles have changed the world, your reward is, you can hang out with anyone you want to in heaven.'
Arthur thought about it for a minute and then said, ' I want to hang out with God.'
St. Peter took Arthur to the Throne Room, and introduced him to God.
God recognized Arthur and commented, 'Okay, so you were the one who invented the Harley-Davidson motorcycle? '
Arthur said, 'Yeah, that's me...'
God commented: 'Well, what's the big deal in inventing something that's pretty unstable, makes noise and pollution and can't run without a road?'
Arthur was a bit embarrassed, but finally spoke, 'Excuse me, but aren't you the inventor of woman?'
God said, 'Ah, yes.'
'Well,' said Arthur, 'professional to professional, you have some major design flaws in your invention !
1. There's too much inconsistency in the front-end suspension.
2. It chatters constantly at high speeds.
3. Most rear ends are too soft and wobble about too much.
4. The intake is placed way too close to the exhaust.
5. The maintenance costs are outrageous!!!!
'Hmmmmmmmmmmm, you may have some good points there,' replied God, 'but hold on.'
God went to his Celestial supercomputer, typed in a few words and waited for the results.
The computer printed out a slip of paper and God read it.
'Well, it may be true that my invention is flawed,' God said to Arthur, 'but according to these numbers, more men are riding my invention than yours'.