Tiebreaker competitions online are still not as popular as offline, but their numbers are slowly increasing. In a tiebreaker or slogan competition entrants are ofen asked to make a purchase and then provide an answer which will be judged by the organiser to decide the winners.
With tiebreakers you are often limited to a number of words (e.g. 12 words or less), and a lead in sentence may need to be completed. Other competitions may just ask you to choose something in an order of merit and give reasons for your choice. In most cases the judges will ask you to be apt and original.
Although we have won one tiebreaker competition (a holiday to Barbados) Loquax can't give you too much in the way of "how to enter and win tiebreaker competitions".
The best advice we can offer regarding tiebreaker competitions is give them a try! Try and be apt to the competition and prize. Humour is often good, but don't be too contrived. Test your slogan on a friend - if they don't understand, how will the judges? A list of current online Tiebreaker Competitions are available on Loquax. For further help and advice visit the Tiebreaker Clinic in the Loquax forums.
For additional help with tiebreaker competitions, including offline competitions, try Winspiration.