Buy some sticky notes. Write sweet sayings on them, I love you, Your the best, you are beautiful, You make me complete etc etc and then stick them everywhere hide them in the drawers and cupboards, behind the bathroom medicine cabinet mirror, In the shower, in her car, in her jeans etc etc. Put them in places she will be discovering for weeks to come. The gift that keeps on giving. She will get a thrill from it and never forget how sweet you are.
Buy her a small tree, name the tree after something special your wife loves,and plant it together, watch it grow through the years, this is a wonderful gift.
God Bless you happily married man.