Findings from an ongoing validation study suggest that certain informant-reported cognitive symptoms appear to help healthcare providers determine whether patients have normal cognition or amnestic mild cognitive impairment (aMCI). Strong indicators of an aMCI included:

Informant-reported repetition of statements and/or questions.
Trouble knowing the day, date, month, year, and time.
Difficulty managing finances.
Decreased sense of direction.

Source: BMC Geriatrics, February 3, 2012