It's sometimes best not to ejaculate for a few days. Then, after a few days, during your masturbation session - make it last long. Do not ejaculate within in the first thirty minutes. Some make it last a couple hours. And drink fluids during. If you combine all three - you'll be able to shoot.
Yes, after abstaining for a week you are ready. Masturbate until you are close, but not too close, to ejaculating. Stop. Repeat. Keep doing this for as long as you can - an hour at least. When you do decide to go for it try to hold it in. Finally you'll shoot the moon with an awesome orgasm.