You're not too early to think about it at all! Definitely take folic acid at least 3 months before starting TTC, and right through to week 12 of pregnancy...I'm taking boots conception support, have been for nearly 3 months, and I'm not TTC til summer 2012. They are £3.99 for a box of 30 (so a month's supply), and boots often have a 3 for 2 offer on. They're a lot cheaper than pregnacare or sanatogen, and they have more vitamins etc in them. You're supposed to limit your vitamin A intake too, as it's bad for the baby to have too much...that's why the conception/pregnancy ones don't have it in.