used to express someone's viewpoint
As far as I'm concerned, we should leave early to avoid traffic.
私に関して言えば、交通渋滞を避けるために早めに出発すべきです。
used to indicate someone's opinion about something
As far as I'm concerned, we can try a new restaurant tonight.
私に関して言えば、今夜新しいレストランを試すことができます。