(men) how can i make my voice sound better?

How old are you and is your voice changing? If puberty isn't the problem, the best way to achieve "better sounds" is to get a voice teacher. You risk damaging your voice if you try to train yourself. If you knew what you were doing you wouldn't be having problems now. Many amateur singers have no clue on where and how to begin, and may either misunderstand instructions they find online, in books (or on Yahoo Answers), or try to fix things that don't need to be fixed. For example, many singers want to sing higher--no matter what their voice types. Yes! Lessons can teach you to sing better high notes (and low notes for that matter)--but those notes are not the same for every singer! Each singer has unique strengths and weaknesses and qualities---that's why you get a voice teacher. To make the most of your own voice--not to try to sound like someone else.

So I'm not a man, but I do sing tenor to high soprano. First, make sure you're breathing properly. My singing teacher gets me to jump around and move when doing warmups, to make sure that I'm exhaling and inhaling as much air as possible. You should feel your ribs expanding sideways. Try and keep that level of air up while you're singing, and your ribs expanded, to help with the cracking. Second, make sure you're opening your mouth and focusing on vowels. It might feel funny at first, but while you're singing with good breath, place a finger on your chin and pull down to open your mouth. A closed mouth with only cause more cracking and weak sound. Do lots and lots of warmups before you sing, and never push yourself to the point where it hurts! Good luck :)

So I'm not a man, but I do sing tenor to high soprano. First, make sure you're breathing properly. My singing teacher gets me to jump around and move when doing warmups, to make sure that I'm exhaling and inhaling as much air as possible. You should feel your ribs expanding sideways. Try and keep that level of air up while you're singing, and your ribs expanded, to help with the cracking. Second, make sure you're opening your mouth and focusing on vowels. It might feel funny at first, but while you're singing with good breath, place a finger on your chin and pull down to open your mouth. A closed mouth with only cause more cracking and weak sound. Do lots and lots of warmups before you sing, and never push yourself to the point where it hurts! Good luck :)