1) My sisters together made me a recipe book of all their best tried and true recipes, supper ideas etc. I have a nice collection of store bought recipe books, I use this the most!
Though it is work writing each recipe. In the beginning I loved making a recipe and figuring out whose handwriting it is.
2) Another nice idea is a clock with her wedding invitation/chosson kallah picture as the background, there are a lot of stores that make that.
A cute Hafrashas challah to hang up in the kitchen, you can get a decorative one in any Judaica store, alternatively, the same idea in a AL ahmichya. Anything she hangs in her kitchen will be a constant reminder of u!!