Blood clots are an uncomfortable and potentially fatal condition. And unfortunately, in our society where we're often expected to sit for long periods of time--on planes, at our desks--they're an all-too-common occurrence. If you're planning on taking a long-haul flight this holiday season, make sure you take steps to prevent a blood clot -- you're life could depend on it. Here are some tips:

• Talk to your doctor beforehand to determine if you have any risk factors for DVT (deep vein thrombosis) or pulmonary embolisms.
  
• If you're at risk, make sure you're not taking any medications that can lead to clots. Birth control pills and patches are a common medication that have been shown to lead to blood clots.
  
• Drink lots of water before, during and after long flights.
• Avoid lying down for long stretches of time