Peter ends his second letter with a discourse on the Day of the LORD. If you have a chance, read 2 Peter 3.
In that chapter he speaks of the scoffers who do not believe Christ will return and instead live their lives according to their own sinful desires.
Peter insists, however, that history has proven that things can change in an instant and that when Christ returns heaven and earth as we know it now will be forever changed.
For those of us who wait for these things, Peter says … “It is clear what sort of people you should be in holy conduct and godliness as you wait for and earnestly desire the coming of the day of God.” [3:11b-12a HCSB]
Peter then becomes abundantly clear about what he means when he said we should be people of holy conduct and godliness. [3:14-18]
We should be people who “make every effort to be found at peace with Him without spot or blemish.”
We should be people who “regard the patience of our Lord as an opportunity for salvation.”
We should be people who are “on [our] guard so that [we] are not led away by the error of lawless people and fall from [our] own stability.”
And we are to be people who “grow in the grace and knowledge of our LORD and Savior Jesus Christ.”
Seems to me that should keep us pretty busy while we are waiting.