SleepDocWatson

I suggest that you start a worry journal in the evening, set aside 15 minutes before you go to bed - write down your negative thoughts and then close the book, allowing you to go to bed with those thoughts on the page, not in your head.

Sleeping better outside of your typical home environment may indicate a problem with your home sleep environment. Check out this page for a lot of info that may help: http://www.sleepeducation.org/healthysleep/Make-Time-2-Sleep-Bedtime-Calculator

Much of that is yet to be determined. We do know that the spaces in the brain expand to allow clearing out of the days thoughts - like a garbage man for the brain.

You likely have a delayed sleep phase, with a preference for a later bedtime and waketime. This is only a problem when society forces you on an earlier schedule. I suggest you find work that allows you to sleep later in the morning

Chronotype is the notion that some people are "morning larks" while others are "night owls". Much of this is genetically determined.