I don't use LinkedIn.I think it's a little tough because linkedin is the work equivalent to facebook. You get some people crabbing about how their mom won't leave their room at 35 years old, but most of it is people showing off their new cars, boats, vacations, kids, or whatever. People don't post mediocrity....so comparing myself to super-posters is always depressing.
Facebook is for my humor, not for caring about things.
I don't get depressed about others having more, unless it is free time.