I had great success picking up a consistent meditation habit with the greasing the groove-approach[1].. in essence, every time I would feel a bit foggy in the head, I would take a 3-15 minute meditation session. It usually results to 3-5 sessions per day. It's such a great mental reset, and I haven't since experienced the kind of complete depletion that you get from pushing yourself hard through the day.

I bet some Zen master would reprimand me for this being the wrong approach, but I found it quite difficult to get into the habit of doing, say, a single 30-60 minute session per day. Now I can consistently drop into the meditation session with no urge for procrastination and have also successfully experimented with longer ones.

[1] refers to the method of increasing your pull-up capability by installing a pull-up bar in your office / bedroom doorway and doing a set every time you pass through the doorway