Place your characters in time by some reference to when the action is taking place. For instance:

'Jemima sat up startled. Of course, now she understood. The whole problem started the day Trudy came to live with her almost three years ago to the day. Now it all began to make sense...'

So although we don't yet know in what year the current action is set, we do know that Sally and Jemima have lived together for three years and that the 'problem', whatever it is, has been brewing for that length of time. This simple time framework has set the story up.

If we want to give the reader a more accurate picture we could say, 'The whole problem began just after VE Day nearly three years ago.' The reader can now picture more clearly when the action is taking place.

Naturally, if you wish, you can be very precise: 'It was 9.15 in the morning on Tuesday 27th March 2004 that...' But if you do that there really needs to be a reason behind such an accurate point in time, otherwise it's bordering on the pedantic and serves no useful purpose.

If time elapses between two pieces of action try to give the reader a sense of how long this is. If your character is catching a flight from Gatwick to Cyprus you could write something like:

'Stephen boarded the FlyMeRight 747 at Stanstead with his head in a whirl. Melissa's final words to him had hurt more than he wanted to admit, but as he booked in at the Beach Palace Hotel in Paphos four hours later, he had reached a place of acceptance that his decision to leave had been the right one.'

This highlights another aspect to bear in mind when transporting your readers from one scene to the next. You may need to slow the action down a bit or change the momentum. If so then taking the story forward in time is a good place to do it.

On the other hand it may well be necessary to maintain the tension and carry it forward from one action point to the next. So instead of the above we could write:

'Stephen boarded the FlyMeRight 747 at Stanstead with his head in a whirl. He was still trying to come to terms with Melissa's scathing outburst as he booked into the Beach Palace Hotel in Paphos four hours later.'

This neatly covers the journey time and also maintains the tension of what he's going to do now that Melissa has dumped him. (If that's what she did!)

Talking about tension, some stories are driven by the need to complete a task before a certain time. Stories such as 'Independence Day', '24' and the scriptwriter's favourite where the hero has to find and defuse a time bomb to prevent New York being vaporised are prime examples.

Your story doesn't have to be as nerve shattering as that, it could be something a little more reasonable such as getting a newly engraved cup to a prize giving ceremony on time. Will she make it in time or won't she? Indeed, more down-to-earth situations like this can be just as exciting too!

So, aim to use time transitions to take the reader through the narrative smoothly and with a clear understanding of how time has passed throughout the story.