I found a way to get my internal clock used to the new time faster (I usually take about 3 months before I'm used to the new time zone...)
Go one time zone to the west the day after the clock changes... Clock changed on Sunday from GMT+2 to GMT+1, and on Monday I was in GMT... By the time I got back home in GMT+1 on Thursday, my internal clock was adjusted to one hour time difference

(problem is, the pictures I made on the trip are two hours off, as I forgot to change the clock on my phone camera

)