I had flowers for a few of mine and loved them (and I'm not usually a big flower person). It showed people were thinking of me.
Chocolate might have gone down well, but I don't think I was eating much around that time, so not guaranteed to be so good.
Sending on the due date is NOT so good an idea, imo. I would have HATED that! Mainly cos I did my best to try and forget all 4 missed due dates.
Sometimes hits me May Day that I lost one a few years back then, but now I have DD, no so bad.
Tell your friend to post on MN if she wants help/support. The mc thread is so helpful when you're struggling/fed up with putting a brave face on.