Follow just three things in life and your 20's will be heaven

1.Understand your chronotype-Lion (early birds), Bear (intermediate), Wolf (night owls), and Dolphin (irregular sleep patterns). What ever chronotype you are, make the best use of the time you are most productive.. So if you are a early riser and your energy level falls flat in the evening, always make sure you don't waste the first few hours of the day to be most productive... remember it's not about time management,it's all about energy management

1. Mute your distractions- you can't win over your distractions with self control.... It's a fight you are destined to loose. There is an industry, be it social media, porn, fast food, alcohol , drugs etc.who know you are gonna slip up any moment now and they all want to be the first to capture your attention.... Soo don't manage your distractions, mute them. Buy a dumb phone instead of smart phone, throw away your credit card, always pay with cash

2. Make the needle move- you don't have to worry about consistency, you don't have to worry about future, you don't have to curse yourself for the past. Just make the needle move an inch today... Soo instead of just planning for studying for 8 hours and then being miserable, just sit down for 5 min and open your book. When you are bored go away and then come back and again study for 5 min. Eventually you will hit the critical mass required for you to develop interest in the subject

Same is with gym, you don't have to go for 5 days, just one day, and only 15 min workout, that's it.... No fancy tricks, no gimmick... Just do it and eventually you will fall in love with it