There are many things to do to increase your load volume. If you are in it for the long haul, meaning you want to increase your cum volume on a consistent basis you need to make sure you continually give the body what it needs produce its semen. There are many volume increasing pills on the market but I honestly think they can only offer one component in many to get the results you are looking for. Here are a few simple things you can do every day that will increase your volume
1- drink lots of fluids! this is prob the biggest, and easiest thing you can do to maximize cum volume. Why? because your semen is primarily made up of good ol H20.
2- take supplements to give your body what it needs to produce more cum. Simple supplements such as Zinc taken with folic acid. Amino acids which are the building block of proteins, which is a huge component of your cum load. They don't call it a protein shake for nothing. You guys like protein shakes don't you?

jk. B vitamins...and so on
3- Chinese herbs - traditional chinese medicine has been around for years and if you don't think that those emperors needed help with their harems, than you are highy mistaken. One of the most common libido and ejaculate increasing herbs is good ol ginseng. The chinese refer to it as herbal viagra. Other herbs such as yin yang huo can be also used. But the best herbs come in the form of herbal formulas which are a blend of herbs all acting on the body in different ways. There is a lot to say about the subject of herbal formulas. You can read about one formula I have effectively used over the years
here. Whats important to realize when taking herbs is that you want to take them for a period of 1-3 months. The goal is to build your bodies internal chemistry so you can consistently produce more cum. Not just for one night but on a regular basis.
4- eat lots of fruit and veggies. Not only will this increase your loads but it will make them taste better too (so I've been told)
5- avoid tight underwear and crossing your legs. Not only do both of these things put pressure on your nut sack but they also hold your nutsack closer to the body. The whole point that your balls are in a sack on the outside of your body is to keep the temperature down. Keeping your balls cool is a vital component to producing more sperm.
6- avoid hot tubs. due to the heat issue i just mentioned
7- minimize stress - when the body is stressed its not resting and rebuilding.
Those are my basic pointers on how to increase your ejaculate volume. You can find a few more at lordofloads.com
A note about masturbation frequency. Some people think that if there don't shoot a load for 2 weeks its volume will be more than if they shot a load every 2-3 days. This isn't exactly true. Once your sack is full of cum (which usually only takes 1-2 days, it will stop producing more sperm, if it didn't than your sack would explode withing a week of not getting off.

On the flip side of that, if you are jacking off multiple times a day you are putting way more stress on the body than it can handle and you will shoot wimpy loads. I guess thats all for now on the subject.
Oh, and if you think girls don't love big loads you are highly mistaken. I have the facts to prove that too.
good luck