To repeat -
He should not concede until, at the very earliest, ALL issues in re the election are legally resolved. Biden's inauguration is not contingent on a concession.
Trump should pardon ALL his associates now imprisoned after political trials.
Trump should not attend Biden's inauguration. To attend is to signal acceptance of the legitimacy of this electoral process.
He should move out of the WH and send his staff away before the inauguration.
Mar a Lago would be a good place to spend inauguration day. pl