DH and I started trying at the beginning of July last year. BFP end of March this year!!
I agree with earlier posts, don't chart everything (except keep note of periods, it's handy to know anyway and I tested the FIRST day of period with a value brand test getting our first BFP -I then did 7 more non value brand ones haha) we started out 'trying' and it just stressed us out/I had a little panic about everything so we instead referred to it as 'not trying, but not preventing either, it will happen when it's supposed to happen'. Stressing about trying will ruin the romance of doing the deed. Our family planning doctor said "just have fun" 
.
There may come a point you get worried it might not happen, I started to in February as I realised it had been 7 months and I was scared something might be wrong but the nhs do say a year is normal. I say this so you can be prepared, I found our trying (yet not officially saying trying) quite an emotional roller coaster and I think it's probably normal to have a little freak out at one point.
I'd recommend telling your GP you have decided to try though, I know it's not nice to think about and I hope it never comes up for you but a very close friend of mine has been trying with her husband for a couple of years now and you have to have been trying for a year before nhs do tests/give you any help with it so if they know you've started should you encounter any trouble then they know how long it's been etc. 
.
I read somewhere that the woman's pleasure so to speak is quite important for conception so it's a nice little excuse to have your OH pay that little bit more attention to you during foreplay etc 
.
Also try to be in good health, my husband was unwell (although I put it down to man flu ) due to damp in our old house and we tried for 7 months, nothing. Then within 2 weeks of moving and husband being healthy again I was pregnant!
Good luck 
Xx