I'd say the most important things are:
-make love when you want, not to a timetable or because you think that you're at your most fertile. If you have a healthy sex life and generally make love 2/3 times a week, you're likely to conceive.
-don't look for simptoms. It's important to remember that most pregnancy simptoms are similar to those of an impending period. These boards are full of posts every month from people who say "I'm on day x, I have sore boobs, am sure I'm pregnant", only for the same poster to post two/three days later to say that their af (period) has arrived. Also most serious pregnancy simptoms don't generally start until you're about 5/6 weeks pregnant. Similarly there are lots of posts saying "I've just found out I'm pregnant and have no simptoms" and again the same posters are back a week later wanting to die because of morning sickness etc.
-don't buy any pregnancy tests until your period is at least a week late. Generally if you have tests in the cupboard, then the desire is there to use them, so the thing to do is to not buy them, or it'll cost you a fortune. The longer you wait after your period is late, the more likely you are to get a positive result. remember that if you let yourself go a week late, if you're pregnant you'll still be pregnant a week after your period is due and a test will confirm it, but if you're not pregnant your period will have arrived and you won't have forked out £8 or more on tests.
-remember that it can take a normal fertile couple up to a year to conceive, so try not to let the disappointment get to you if it doesn't happen the first month or even 3/4 months. If you've been on the pill for 18 years then it will take time for the pill to come out of your system, and possibly even for your cycles to return to normal. If you set your sights on a year, then if you fall sooner it will be a lovely surprise, but if you thin it will happen straight away, then if it doesn't the disappointment will be unbearable.
good luck x