Creating something is the best way for me to get engaged when I'm like that. I am a musician, and I find I can be super creative during depressive periods... though I may not come back to the pieces again because they remind me of the depression, it is still a release. Sometimes I build websites, write poems, cook a meal using a newly found recipe... Cleaning also helps me, I am normally very slow when I am down and energyless, but I still clean/tidy sometimes (dishes or floor or drawers, don't do too much)

here for you vertigo, don't feel bad about doing nothing.