INDEPENDENCE, Ohio — Rule No. 1 when playing with LeBron James: You’re open, even if you don’t know it.



Rule No. 2: People will say things about your game you’ve never heard before, and they aren’t flattering.



Rule No. 3: Get ready to go to heights you’d never dreamed you’d reach.



There are more. You get the drift. This is what the Cavaliers lived the past four seasons, when James was here as the center of the NBA universe (east of Oakland, Calif., anyway) and the franchise made a habit of going to the Finals.



Because this is the modern NBA and everyone is friends, the Cavs who did the LeBron experience shared their notes with the Lakers who are just now seeing what it’s like. Training camps opened Tuesday for both teams, and in the days and weeks leading up to now, LeBron’s former teammates wanted to make sure their pals on the other coast knew what was coming.



“I just told them...