A spa voucher or wellness retreat or restaurant reservation or event ticket. An experience gift as a thank you is generous and gives her something to look forward to. A spa day works because she deserves relaxation after wedding weekend stress. A weekend retreat works because it acknowledges serious commitment. A restaurant voucher works if you want to take her out yourself. A wellness class works if that aligns with her interests. Experiences often feel more generous than material gifts. These are the experience thank you gifts that work because they say thank you with something memorable.