First of all work out how much fish your tank size can take (plenty of these calculators on web - do a google search). Then stock gradually - I'd say at least 6 weeks and then possibly even longer the next time, especially as you get nearer to the maximum, lets your filter bacteria have enough time to grow to accomodate the extra waste!
Also, will give you time should you accidentaly introduce any unwanted disease, to help cure the fish.
Take your time and be patient. You already have been if you've cycled your tank so u dont wanna become impatient now just as the fun begins!!!