There are a number of different delivery systems for increasing calcium in the diet. Obviously, the most popular and easiest/most convenient way to ingest calcium is from dairy products (milk, cheese, etc.). One could also take a calcium supplement such as this one: http://www.dotfit.com/Super_Calcium-pid-1004.html
Please keep in mind; to maximize absorption, it is very important to take calcium supplements with food and not on an empty stomach. Another way of providing more calcium is by drinking calcium-fortified orange juice. There are even calcium-fortified alternatives in the form of water, chocolate and even fiber that are available today.