What are you recommendations when it comes to sleeping on a long journey?

I'm going to fly east, leaving home at midnight, fly for 10 hours, have a layover of 1h30, then fly for 5h30 and land at midnight (local time).
My goal is to start the following day rested and ready to go (early).

Should I sleep on the first leg, nap, stay awake until the final destination...?