that's a million dollar question right there, and one we all wish we had an answer for
I don't really think there is anythig you can do
minus maybe bumping him out of his bed and then trying to get him coming back to it
you can try putting out food,on a timer, to condition him to come sooner to get some
but big bucks tend to live long by being smart, and know the tricks
having folks do a slow drive can work too
but a buck that is ona routine to move at night, many claim are un killable due to they tend not to move off what has kept them alive so long
if food is there 24/7, they can eat when they feel safest, and most mature deer seem to find dark hrs the safest, cause they are
if you know where he is bedding its a huge help
maybe a decoy , if it can be set up so he see's it at frist light??
but other wise, back track closert o the bedding area, bump him out of it and try to get him coming back
or have a buddy try to drive him to you, them 3 are best bests!
good luck