What can you do to drastically better yourself in 3 months?

Exercise everyday. Bike to work, take a 15 mins walk or simply do 30 push up everyday. → improves health

Try to read 10 mins everyday. Preferably literatures and not gossip magazines. → improves your thinking

Listen to podcast instead of music. Listen to stories about successful people. Learn from theirs mistakes, it’s cheaper than making them by yourself. → free life advices

Call your parents every second or third day. → they brought you into this world, now they should listen to your suffering. Just joking, this keeps you grounded and humble.