I'm glad to know that its normal to have weird sleep patterns after long flights. Joey is having trouble getting back his sleep patterns after his flight back from Germany. For me the distance was almost double but I'm glad that I don't feel to sleep longer than normal.
I have been going to bed early, and by early I mean really early i.e. around 2100hrs. I start feeling sleepy around 2000hrs but I do drag on for another hour or so. Then I end up waking up after 6 to 7 hours. The major problem I had was trying to keep awake while watching Casino Royale last night. The movie was good and probably the only reason I was able to keep my eyes open. In the end, I was tired of keeping my eyes open and just fell on my bed on reaching home.
On the brighter note, I think working in the early morning might be a bit more productive than late night. I have to test that more and if it is really the case, I will have to stick to a new schedule as I have always been more of an owl than an early riser.
PS: One thing I learnt this time during the flight -> drink lots and lots of liquids during flight. Keeps you hydrated and keeps the digestive system normal too.