Hi Anroga - Great that you're getting geared up for the stimming. On diet, there is so much contradictory information, I would say pick an approach that seems doable for you, and is based on what you "believe in", if that makes sense. I don't meanGod, higher powers, etc. I just mean think about your general approach to food, what makes you feel healthy. So for me, I wasn't fussed about carbs, but was more focused on natural, chemical-free foods, because this is important to me. I've been swayed by the research on the damage of E numbers, chemicals in processed foods, refined sugars etc, and I felt much better cutting these things down or out of my diet completely. For example, I never go for "low fat" yogurts with tons of flavourings, but instead have plain natural yoghurt with a teaspoon of honey. But I can't say those yoghurts are bad for you (I'm no scientist), it's just what feels right for me!
Of course, in the process, I've cut down on "bad" carbs (white pasta, white bread, crisps etc), but that hasn't really been my aim.
I know there is also evidience (I think Shell has referred to it?) that suggests high protein intake could improve the quality of eggs and embryos. I know I can't do everything, and so haven't really bothered too much about this, though I do make an effort to eat fish regularly (as I don't really eat meat).
I think the key is really working out what feels comfortable for you, and not setting your expectations too high. This can be a really stressful time, and putting extra pressure on yourself won't help. So make sure you have plenty of treats lined up too 
On accupuncture, I've been doing this for years (well, I haven't actually been DOING it, rather lying back and letting someone else get on with it!). I saw an accupuncturist recommended by a friend also having fertility treatment a few weeks before I started my treatment (in fact, I'm pretty sure she kick-started my ovaries as I was several weeks late and hadn't yet ovulated that month). She encouraged me to go back between EC and ET, but when it came to it she was away at that time, so I found another practitioner. I called a few to find someone who had any experience of fertility issues and IVF in particular, and found one who was warm and reassuring. She was great and, well, I can't say it's "thanks to her" that my embryo stuck, but I did get the BFP I was hoping for so it certainly didn't do any harm!
I was told off a bit on a different thread once for saying accupuncture can help with fertility issues (another poster insisted it only dealt with relaxation/stress management), but I have consistant experience of using accupuncture to treat ongoing medical problems (esp digestive), and found it works really well for me. I know it can be pricey, esp in London, but there are more and more practioners these days who offer open clinics, where you have an initial consultation in private but the subsequent treatment is done in a bigger room with several beds - this cuts down costs considerably and so is a more affordable way to have ongoing treatment.
Best of luck!