There are lots of guidelines for your posture when you're sitting at your desk, for those who use a standing desk, or if you combine both. But what if you're not at a desk? What's the best posture for those of you prefer to get your work done on the sofa or in bed?

According to one study from 2010, if you're regularly using a laptop, the best position is lying down with your knees up and the laptop resting on your thighs.

Every other position you can think of will create strain somewhere in your body, as demonstrated in the image below. The top-right image demonstrates what the study says is the ideal posture.

If you find it difficult to concentrate when you're lying down, an alternative would be to sit up and place a pillow directly behind your lower back.

"When you focus your eyes on your device, your body is going to follow, often into an unhealthy position,” said Mark Goetz, a furniture designer who designed an ergonomic sofa. He recommends keeping your devices at eye level so that you don't slouch or strain your neck and spine.

If you have to sit on a sofa while using a laptop, try to prop your laptop up closer to your eye level.

What are your tips for ensuring working on your laptop when you're not at your desk doesn't put a strain on your neck or back? Let us know in the comments.