In addition to that, if you don't have much time, better place only small amount of money. At least, you won't regret much if you lose that bet because you already know that you have very little time to assess the odds.
Or better yet, just let go that event and just bet if you feel you have ample time to gauge the odds. Betting in a hurry won't do any good even if you say you are basing it to the odds given by the bookie. We can understand that low odds are usually the pick of the bookies or the pulse of the community. However, if you truly know the athletes and the game itself, you will have the instinct of the possible odds and you understand that upset can always happen in any game.