hrmm... firstly, do you have an allergy or sinus problem?
being exposed to allergens or having sinusitis prior to your trip might just cause you to have problems equalizing. other possible causative factor might be a urti.
hehe, if none of those above are troubling you then, my bro irukanji's technique will work

as for wasting air for equalizing, is it possible that its not due to equalizing but just the anxiety of not being able to equalize? hehe, my suggestion.. try get more dives under your belt, make and meet more friends who will give you the confidence and maybe you'll be able to feel less anxious? plenty of divers here who go out on regular trips and also meet up in town for drinks.
anyway, all the best in your AOW! ada trip, do tell. haven't had salt water in a while
