That is an extremely broad topic, and can be quite intimidating to some. What does having a well rounded life even mean? Well it can mean a lot of things to different people, but what should be at the center of a well rounded life is your personal happiness. Whatever gives you joy and whatever gives you meaning, it is imperative that you sacrifice anything for it.
There are so many things that make me happy, my wife, my family, my friends, and my hobbies. Finding the time for all of these things is very difficult, but I feel that in order to find purpose in this life, we need to find the time for our own happiness. My wife and I are both working and are close to graduating from college, our weekdays are so busy that we often only see each other for an hour or two a day.
In order for me to function at school or work I need to be both physically and mentally in shape. Every morning I wake up at 5:30 AM to go to the gym and lift weights. This is very beneficial to both my physical and mental fitness. Because I work and go to school the only time I have for the gym is early morning. This requires me to be very disciplined at night when it is time to go to bed. I usually am in bed by 8:30 no later than 9:00.
Another thing that brings me a lot of joy and purpose are my hobbies. These include fly fishing (as you all know), shooting guns, snowboarding, snowmobiling, boating in the summer, hiking, and many more. I try to budget my time with these outdoor activities. Luckily my wife enjoys most of my hobbies so we get to do them together. This has really blessed and strengthened our marriage.
The only way to find try happiness is to find what gives your life meaning. Everyone on earth has a different purpose for being here, and thus different things give us meaning. I encourage you to find what makes you the most happy, and then to center your life around it.