Sleep for 8 hours every night. This is non-negotiable. Do this first before anything else.
Don't eat until you're full, eat until you're not hungry anymore. Prioritize fruits, vegetables and legumes; eat less meat, dairy and processed foods.
Exercise 2-3 times a week. Can be anything as long as you maintain a heart rate of over 120BPM for about 20 minutes at least.
Drink more water than you think you need. In fact, drink some right now.
Wash your face every day (after going out, exercise etc) but only with a gentle facial cleanser.
Shave only after a hot shower and a face wash.
Moisturize your face and body every day after showering. For your face, definitely use moisturizer with an SPF >20 or apply sunscreen after moisturizing.
Throw out all your all-in-one body wash/shampoo/conditioner. Get good quality ones for each.
Do NOT shampoo more than thrice a week; it's not good for your hair.
Exfoliate in the shower and use a face mask about once a week to unclog your pores and cleanse the pollutants of urban life.
Talk to your male friends about your emotions and ask them about theirs.
Get clothes that fit. Take ones that don't to a tailor for cheap alterations.
Cry when you need to. It is normal and healthy as an outlet.
Make the time to regularly be idle and think/reflect/introspect.