While I was TTC I was one of those who hated being told to "Just Relax" and "try not to think about it", it brought me to tears each time as while we didn't have much trouble falling pregnant in the long term, we just couldn't get them to stay sticky.
Before having my DS I lost 4 bubs before 8 weeks, and went through the rollercoaster of depression, bad relationships etc, then I met the man I've now married, and relaxed and had fun and did everything that I hadn't done previously, was on the pill and low and behold DS was conceived when we had only been dating for 3 & 1/2 months and stayed sticky... so sticky in fact he didn't even want to come out in the end.
When we decided to try for #2, we started early thinking it would take a while did the whole "Trying-Without-Trying" thing for a few months, which didn't work.
Then I gave in over christmas/new year 2009/10 in the lead up to our wedding and we got a BFP, which I sadly lost a few days later on the night of my hen's night.
In late feb I gave up again for a bit again, and got another BFP which didn't stick either, and was gutted.
I kept plodding along for the next few months, but my heart wasn't in it anymore, so I decided in the lead up to mine & hubby's birthdays to just forget about the whole thing and be grateful for the gorgeous little boy I already had...
Low and behold I O'd just before hubby's birthday, drank and smoked at his party, spent the next week and a bit drinking and smoking with friends and enjoying myself and then on the day after my birthday (15dpo) I got my sticky BFP who is now due in 2 weeks. While it didn't take us that long really (11 months of TTC is nothing compared to what a lot of you amazing ladies go through), it still felt like forever, and every loss, every time AF reared her ugly head, I died a little bit inside, as I'm sure many of you do and can understand.
I now think that it works for some people, but not for others, but you will never know until you try.
Me personally, if I have shared the journey in the past with someone who is currently going through TTC, and they know that I have been there and done it and I say "just relax" they know that I don't mean it in a bad way, I mean it as a supportive person who knows what they are going through who is trying to help and can't find the right words to replace those ones that end up sounding so horrid.