give her something that she likes if she's your mother she'll appreciate anything you get her. ( just not anything gross) give her something that you like and she likes. or maybe what she has already but is really really old and she doesn't really want anymore because of that.
If she is mobile, a gift card to her favorite store. If not, ask someone in the family what she likes. My late mother-in-law had a draw full of gifts she didn't want! I bought her a night gown or Youth Dew (Este Lauder) Cologne.
gift cards to her local mall, fresh flower arrangements, delivered to her home, are nice if she has no allergies, gas gift cards if she drives, gift certificates to local car wash, gift certificates to her favorite restaurant, fresh fruit arrangements delivered to her home ,these are a few different ideas that I have used.