Newton's First Law of Motion applies to productivity: objects at rest tend to stay at rest. The hardest part of going to the gym isn't lifting the weights; it's putting on your shoes.
Scale It Down to Stupid
The 2-Minute Rule states: "When you start a new habit, it should take less than two minutes to do." Read 30 pages becomes "Read one page." Run 3 miles becomes "Tie my running shoes."
By making the habit "stupidly small," you overcome the initial resistance. Establish the habit first; optimize it later. Standardize before you optimize.