For me cutting soda's was effortless really, all i used to drink while playing ffxi was sprite which is caffeine free. Caffeine is one of the worst most socially accepted chemicals around i would never recommend anyone use it for anything. Once i started lifting and got into preworkouts I thought it was amazing. Then after a few years of doing preworkouts i tried various hard stims like coke etc and realized that they were either on par or shittier versions of what i was taking nightly for the gym. Stay away from caffeine people, it's addictive and it fucks with your adrenal system more than most stimulants.
Also i might have posted this before but since we have been talking about gaining/losing weight and calories the past few pages it's relevant and probably one of the best macro/calorie guides ive seen.
http://forum.bodybuilding.com/showth...hp?t=156380183
edit: Also i just ordered all the things i need to make my own soylent so i will be starting that in a week or so. Will prolly post updates if i don't die of malnutrition.