When I get enough sleep my mind goes in overdrive and I'm very restless. Yet when I don't get enough sleep, I feel depressed because I lack the willpower to not

When I get enough sleep my mind goes in overdrive and I'm very restless. Yet when I don't get enough sleep, I feel depressed because I lack the willpower to not spend hours browsing or gaming (and lose more sleep). I want to combat the restlesness by forcing myself to do physical exercise (running, doing stuff in the garden,...) and meditating. But it's hard to keep up and not fall back into a downward cycle of sleeping less and a numbing feeling of depression.