The word "My" is used to identify objects assigned to or belonging to the logged in user. The term can also be used to identify a relationship to an object in the form of "Me" (i.e., Entered By Me Issues).
'My Tasks' are tasks assigned to the logged in user.
'My Tasks' are incomplete tasks assigned to the logged in user where the status is the equivalent of Current.
'My Projects' are projects you are assigned as a member of the project team.
'My Timesheets' are timesheets that belong to the user, and where the status is open, submitted or rejected.