My secret to a good drink is a simple 1:2:3 ratio. 1 part flavored syrup, 2 parts 1/2 & 1/2 or milk, 3 parts club soda, in a glass with ice.
I'm a sucker for texture, so I like the "heaviness" of full fat and full sugar. I like to stick with the real ingredients and just make a smaller drink, about a 10 ounce glass instead of the pint.
Lots of ice
Combine as instructed above. I made Strawberry for myself. This is only 7 ounces of drink (slightly less than one cup).