We found it helped to approach it as 'seeing what happens' rather than TTC. This, I think, made it easier for DH who was happy to have DCs but not foaming at the mouth, as it were, for a baby.
So, we had the chat - are we ready for a family, if I got pg then what about XYZ.. and then proceeded to have a lot of sex. DH was quite happy about this.
Of course, me being me I had it sussed right down to the last second in terms of when I'd be most fertile etc whilst outwardly adopting a casual 'Well, if it happens,it happens' approach. I guess I wanted to kid myself that it didn't matter if it took a long time/ didn't happen for us but I was prepared for that eventuality and have friends who have had a really tough time of it.
As it was it happened very quickly and whilst DH was the one grinning at the pg test as I waved it in his face (obviously not too enthusiastically, in order not to cover him in wee) I was the one feeling a bit overwhelmed, especially as I'd taken the test 'just to see'.
Of course several weeks later facing a scan screen that had two little babies swimming around on it, we were both feeling a tad overwhelmed but also very excited. Just as an aside DH was looking at the screen thinking 'Well, there's the baby and then there's something else - is it the baby's liver?'!!! Then the lovely sonographer told us 'I think I have good news for you - there are two babies' (thankfully not 'you have a baby with a giant liver') and off we went on our roller coaster ride.
ABetaDad is right; whatever you do, nothing really can prepare you for how your life will change despite successful 30 something women liking to be in control of everything, even down to our fertility. It's quite scary coming to the realisation that it is all out of our control but it's also very very exciting.
Like I said, we were as prepared as we could be, right down to my having made decisions about my career. Here I am now with two beautiful 17 month old daughters and actually a new very fulfilling career that fits around our family life perfectly.
I guess what all this rambling is aiming to tell you is it doesn't work out in the way you imagine but usually it does work out. If there's nothing stopping you then what's stopping you?! And if 'actively' trying to conceive is a bit too much and a bit too clinical then stop taking your pills start taking your folic acid and 'see what happens' - don't forget the lots of sex bit though