I would say anything but flowers.

1- An small Photo Album with photos of both of you and friends.

2- A music box or figurine.

3- An small desk water fountain.

4- A Photo frame with a very funny photo of your self with a single flower.

5- Anything related to her hobby.

For example:

- A music CD if she is constantly listening music.

- An small painting set if she love to draw and paint in canvas.

- A poster of a unique place or an special moment if she love photos.

- A valleyball if she plays.

- A new par of scissors if she is a cosmetologist.

Do not give any clothing unless you are sure of her size and know exactly her taste. It is better in this case a gift card of her favorite clothing store.

Do not give anything she will rarely use. If she is a mother do not bring her a case of make up unless she works outside the house. Mothers with young children usually don't ware any make up. In this case will be better to bring something for the kids instade of her. Find out the children ages and buy something that every children likes such as a DVD movie for children, coloring books and crayons or books.