I clean my living space, clear out old baggage and remnants of old identities, to make space for the new. Lethargy seems to come when I am ready to let go even more and allow life to show me my next steps, but I need to listen to the message.
In the depression/anxiety/lethargy space I find it's not time for any major life breakthroughs.
The biggest breakthrough for me is finding the initial half ounce of mojo to begin the space-clearing and space-claiming process... whether washing a single dish, throwing an old piece of clothing, deleting an email I'll never get around to replying to.
Then, doing it again, and again, one damn t-shirt at a time.
Soon the momentum picks up and the clearing happens by itself.
Also, for me generally the only way out is through - I find it starts with acceptance of this moment as it is, so I'm careful to not add my judgments ("This should not be happening", "I fucked up", etc.) to the situation, but instead hold the lethargic/anxious/depressed parts of me in kindness. Not trying to change anything about them.
From that starting place of self-kindness I can take a breath, dust myself off, and begin taking one simple, tiny action – not to make anything happen but only to make space for the new and invite it in.
I ask myself often: Which old junk am I ready to let go of to make space for the new? I don't need to know what the new is, just trust life and start throwing away the shitty t-shirts.