Purplecat - for me the best thing anyone can do is show interest and ask how we are and things are going. Offer a shoulder if needed or just to take me out for coffee if I need a break from things.
I have had all the relax, stop trying, go on a holiday, give up ivf and you will fall naturally, why not try adoption? But the worst was from a friend after I told her I was not coping with everything after our fifth cycle was her pointing to her two kids and saying "but you can't give up look what you are missing out on". Oh and she repeated pretty much the same sentiment to me yesterday during our 8th stim when all I want to do is walk in front of a bus to get away from the pain, headaches and nausea from this cycle. NFI!