I prefer D76 stock solution and develop 4 rolls of 35mm/36 exposure or 120 film per liter, per Kodak's data sheet, reusing the solution until 4 rolls are developed. I make the one gallon of D76 in a 1-gallon pitcher and place it into 1-liter plain seltzer bottles (any type of soda bottle would do). This is 3 1-liter bottles and a 4th bottle with 0.8 liters of solution (develop 3 rolls with the 0.8 liters). Just squeeze the bottles and cap them so there's no airspace in the bottle, and store the bottles in the dark, as oxygen and light can degrade the solution; stored this way, they can last up to 6 months. I also filter the solution with a funnel and coffee filter before the next use if the solution has been used before. I have found if I develop 2 or 3 rolls with a liter, the solution goes bad, getting cloudy and etching the bottle, if the 4th roll is not developed within 2-3 weeks of the last use.
Using the stock may be easier starting out as using 1:1 use results in remaining solution volumes that make it harder to eliminate bottle headspace air. But that can be done and you may prefer the look of 1:1.
It's always good to read the data sheets for the film and chemicals you are using.
http://imaging.kodakalaris.com/sites/prod/files/files/resources/j78.pdf