[GIve me Best advise according to your Experience how to maintaine Gig Ranking.]

My Question:- My gig gets ranked sometimes and gets the order but after like 1 week then again I am unranked why is this happening? and what the main thing to keep in mind for gig ranking is.
And if we are not getting orders on Fiverr we have to be patient I know but what should we do in that time just sit and look at the empty inbox 
Tell your best suggestion 
Thank you
Sophia