Now this idea may not be new I'd jut like to reiterate the value of it because this is where most people get stuck for the most part.
Not convinced? Well have you tried spending 15-30 minutes doodling out to-do's for the whole week, only to be forgotten and tucked away, so by the end of the week, if by a miracle remembered about your plans, you realized that you've missed out on seminars that you could have attended, events that you would have wanted to participate. You missed out on life and you then tried to back track wondered where you were when all this happened. Mostly you can't recall, if you had you would probably had been doing all the usual stuff that you've had been doing. Your default lifestyle comprised by long hours of surfing online, cleaning the house, and reading a book. When all these aren't really bad, since you are somehow productive in your own way. It could be counterproductive when this comfort sucks you in mediocrity, when this monotony leaves you questioning at the end of the month "what did I do?". You'll be left staring at a scribbled calendar in April, with a big question mark. You shrugged, gave a big sigh and vowed to make next month different. Although that's what you promised yourself the month before that.
What is stopping us then.
1. Laziness. It's when our body becomes 10 times heavier, and our motivation cut in half. We don't have energy to prep up for a jog and go. You try to rationalize the lack of fun and willingness to go, next thing you know, you lack time, and eventually the moment is over. Then guilt starts to creep in and you try to redeem yourself somehow by saying "next time".
2. Pain. Because doing things you don't want to do right now is painful. Going against the current takes effort, doing new things is awkward.
You have to fight these element so you could get what is good. Anything good is worth fighting for so fight the urge and just get on to it.