I'm too tired to get out of bed but I have to

The alarm goes off and my body feels like it weighs a thousand pounds. I know I need to get up — work, responsibilities, the dog — but every morning is a negotiation with myself. Some days I win. Some days I'm late and make up excuses. It's not laziness. I want to want to get up. I just don't have whatever fuel other people seem to have in the morning. How do you push through when bed is the only place that feels safe?