As PP stated, the emotions are the crazy thing about an IVF cycle, that and the fact that nothing is guaranteed (positive or negative) until it has happened- the loss of control drove me nuts!
The only thing to prepare really is to be as healthy as possible and get yourself into a mindset to handle the ups and downs, some people recommend acupuncture, which I’ve both done and not done with my cycles. You and DH should also talk about how you feel about different things (how many embies to transfer, how you feel about multiples, what you are going to do if your cycle isn’t successful, what you will do with excess embryos ect.)
What would I do differently? Well, my first cycle was falling apart and we knew it, I would have maybe pushed them to change dosages and such earlier in the cycle- probably wouldn’t have changed a thing though. This latest cycle, I don’t think we should have transferred two embies- we were sick of disappointment and I will love these babies so much, but twins can be a bigger deal than people think as far as increased complications and such.
I’d ask them who gets to make certain decisions (how many to transfer, what day to do the transfer), success rates for various transfers at their clinic, the protocol they intend to use for you- and why. Also, who you will have contact with during your cycle- the doctor, a designated nurse, different staff.