If your bride is a words of encouragement lady, it’s possible the best gift you ever give her will be a piece of paper.
Write her a letter telling her how much you love her, how wonderful she is, how much you appropriate her, and how proud of her you are. Take the time to find the words you need to express what is in your heart, and rewrite until it’s just right.
Handwritten is a nice touch, if your handwriting is readable. You can also print it out using a nice font. Fancy paper is a nice touch, as is rolling it up and tying it with a bit of ribbon. Leave it where she will find it when she has the time to read it slowly. On her pillow so she finds it when you are in the shower would be a good option.