First of all, stand in front of your human and stare.  If this doesn’t work, stand in front of the door into the garden.
 
This should provoke the correct response, but can be accompanied by whining or even barking if your human isn’t taking any notice of you.
 
If this tactic doesn’t work, then feel free to tiddle in the house, directly in front of your human.  Carpets are better than solid floors as it will reinforce their undesirable behaviour.  Maintain eye contact at all times.

If you want to tease, once you have been let into the garden you can take your time aimlessly sniffing plants rather than having a tiddle at all.  This works especially well at four o’clock in the morning.

Millie the Labrador

I've just seen this wonderful quote:

"Why read a book to find out how to win friends?  Why not study the technique of the greatest winner of friends the world has ever known?  Who is he?  You may meet him tomorrow coming down the street.  When you get within ten feet of him, will begin to wag his tail.  If you stop and pat him he will almost jump out of his skin to show you how much he likes you.  And you know that behind this show of affection on his part, there are no ulterior motives:  he doesn't want to sell you anything and he doesn't want to marry you.

Did you ever stop to think that a dog is an animal that generally doesn't have to work for a living?  A hen has to lay eggs, a cow has to give milk and a canary has to sing.  But a dog makes his living by giving you nothing but love."

How cool is that?