Every hard inquiry on your credit report knocks your score down a little, so you need to find a card that has the best chance for approval. Check out the minimum score requirements the card typically has (you can check our reviews for balance transfer cards for those!) and make sure your credit score is good enough for instant approval. Also, check the promotional rates and ensure the period for 0% APR works well with your strategy to pay off your debts. Otherwise, you could end up accruing even more interest, depending on the market variable rate.