Make a custom voucher coupon booklet. Each voucher is good for one use for example:
She can tear off a "Husband will wash dishes" voucher or "Husband will cook tonight" just maker like 10 of them that have an expiration date to let her know it's real! haha
Make a scrapbook of memorable days you guys have had but instead of pictures use items. For example, I saved the receipt of me and my girls first date or tickets from a show or a shell from a beach. This shows you've been planning this gift for a long time.
It got me my first lay.... with her at the time. Not that you should have any issues getting laid, or... Good luck!