Question: how long does it take to get used to getting up early?
Answer: The most efficient method for changing the time you wake up is to do it gradually — 10–15 minutes earlier for 1–3 days until you feel used to it, and then lower it down. If you get up at 8 a.m. generally, don't suddenly change it to 6 a.m. Try 7:45 a.m. first.