All my shoes, without exceptions, get torn up exactly in the same place after 3 or 4 months of usage: the left heel lining. The right shoe, nevertheless, always looks like new.
Not sure if I do something funny with my left foot when I walk or run, but I think it’s such a waste to have to throw away my sneakers when they’re otherwise still great.
Next time perhaps I should try something like this? ;)
(Pic from: Instructables)