Speaking of things I always, always forget for some reason, use this to put a new schema in your search path:

SET search_path TO schema;

From the PostgreSQL docs:

When objects are referenced in any other context without schema qualification (table modification, data modification, or query commands) the search path is traversed until a matching object is found. Therefore, in the default configuration, any unqualified access again can only refer to the public schema.

I guess I don’t need it often enough to commit to memory. Conversely, I still reference the non-existant DUAL table even though I haven’t touched an Oracle DB for almost a decade.