You sound like your on the right track.In trying to lose fat you should prioritize the aerobics and do the weights more for muscle maintenence purposes .You might work at upping the tempo of the weights through supersets circuits etc. ie less rest between sets .As to diet just go with frequent small balanced meals creating only a modest calorie deficit perhaps starting at 500 calorie and adjusting from there based on feedback.To lose last stubborn fat you need to take a high activity high/high calorie intake (but still modest deficit)approach.Consistancy and patience are two very important factors in your long term sucess sometimes its better to not get to hung up on short term weight measurement monitoring etc.