A temporal shift was a form of transport that was used to move beings through time and space to a new destination where the traveller would be safe. Emergency temporal shifts were normally used to make escapes, the traveller's power levels being greatly reduced from doing so, so as a result they could only be performed in times of great danger.
The Cult of Skaro escaped the Battle of Canary Wharf in 2007 through an emergency temporal shift (TV: Doomsday) and arrived in New York City in 1930. (TV: Daleks in Manhattan) Likewise, Dalek Caan used an emergency temporal shift to escape from New York after the Tenth Doctor foiled the plans of the Cult of Skaro and led the rebellion of the human-Daleks. With the other three Daleks dead, Caan alone escaped. (TV: Evolution of the Daleks)
Caan ended up in the Time War, which was time-locked. The time window to enter it was a mere fraction of a second, impossible to reach. Regardless, Caan entered at the cost of his own sanity, using the chance to rescue Davros before his command ship fell into the jaws of the Nightmare Child. (TV: The Stolen Earth)
The Fifth Doctor performed a temporal shift to move the TARDIS away from an explosion. (AUDIO: Cobwebs) Cardinal Braxiatel stated that temporal shifts were relatively easy to engineer. (AUDIO: The Inquiry)