Time outside
Spending time outside — a park, water, trees, whatever is near — is recommended across the integration literature, and 10% of people in one survey of 608 with extended difficulties named it as helpful. Researchers have proposed that nature contact and psychedelic experiences may reinforce each other for mental health, but that is early theory, not established finding.
No wilderness is required. Sitting outside with a hot drink counts. The point, if there is one, is scale: things that are bigger than you and ask nothing of you.