Headsets: I have tried every electonic gadget available on the market and have yet to find anything as effective and wonderful as the Noise Reducing Channel in C class on a United 777 using those funky headsets.
Jetlag: I have always just suffered through it. The WORST are red-eye flights from LAS or DEN to east coast...a 3 hour flight that departs at midnight local time and arrives at 5:00 am local time...then you are expected to work all day (after having had to check out of your hotel at 2PM the day before!)...