How to prepare for FET?

Hello ladies! It is the month I have been waiting for. My son turns 2 and it will be my FET month. I want advice on how to prepare my body going into this month. My period shouldn’t be here till the 18. From there my RE said it could be about 3 weeks before the transfer. In the meantime what should I be doing? This will be my first FET. I started on this journey in February. We retrieved in March and were thankful enough to get 7 healthy embryos (4boys 3girls). My RE encouraged weight loss. I have lost 10 but that is not as much as she wanted. I hope she doesn’t stop me from moving forward with my FET. Anyways, can you ladies tell me what you did to be successful? I appreciate any advice.