Just my 2 cents, take them or leave them.
About comparing yourself against other people: I don't see anything wrong about it. It can be actually a great thing. By watching people around you, you can learn lots of things. By comparing people against yourself you can appreciate that everybody is different, and everybody has virtues and defects. Trying to use both as a reference, to incorporate the good stuff into your life and learn to manage the bad stuff when you face it, can be good for growing as a person. It's also good to learn to recognize people's defects and not to judge them too hard, and to recognize and appreciate their virtues. If you learn to do that, you can even eventually learn to apply that same principle to yourself, which is always a good think, methinks.
About "trying to be yourself, not other people": Don't try to be other people. Don't "try" to "be yourself" either. Just be. Did you know there are more than 7 billion people in the world? Whatever kind of person you become into, there we always both people like you and people different to you. I think it's good taking other people's virtues as reference and trying to apply them into yourself, but if you get too concerned into either being "like" or "different" than other people, it's easy to lose the track. If you want to "become" someone, then just become a better you, whatever that means to you.
About some practical things you can do in your daily life: Everybody has things that make them feel better. Try to pay attention when you find them or remember them and make a list. Then try to have at least a couple of minutes of those things every day. It can be anything simple you enjoy, like walking, listening to music, exercising, being or talking to someone whose company you enjoy, watching movies, tv series, documentaries, reading about something you find interesting, learning something new, reading quotes from people you admire and who inspire you or something else. I don't mean just something you enjoy, but something that makes you feel good about yourself or life in general even after you finish it.
This post made me remind of some quotes from Bruce Lee:
Quote:Instead of dedicating your life to actualize a concept of what you should be like, ACTUALIZE YOURSELF. The process of maturing does not mean to become a captive of conceptualization. It is to come to the realization of what lies in our innermost selves.
Quote:What you HABITUALLY THINK largely determines what you will ultimately become.
Quote:Choose the positive. — You have choice — you are master of your attitude — choose the POSITIVE, the CONSTRUCTIVE. Optimism is a faith that leads to success.
Quote:Cease negative mental chattering. — If you think a thing is impossible, you'll make it impossible. Pessimism blunts the tools you need to succeed.
Quote:A goal is not always meant to be reached, it often serves simply as something to aim at.
Quote:Don't fear failure. — Not failure, but low aim, is the crime. In great attempts it is glorious even to fail.
And finally (you've probably listened or read this one multiple times):
Quote:Don't get set into one form, adapt it and build your own, and let it grow, be like water. Empty your mind, be formless, shapeless — like water. Now you put water in a cup, it becomes the cup; You put water into a bottle it becomes the bottle; You put it in a teapot it becomes the teapot. Now water can flow or it can crash. Be water, my friend.
Here is a site with some quotes in Japanese. Some of them have the original English version too.