I'm pretty bad about that. I let the voice talk to me, and everything it says is truth, in my mind anyway. It gets worse and worse until this "little" voice, really isn't all that little anymore. It is telling you all these awful things about yourself. The more you listen to it, the worse the thoughts get: you're worthless, you're fat, no one likes you, why are you even alive... I think if you let these little voices go on for long enough, it becomes a monster. The monster eats away at everything, your happiness, your self esteem, your religion, everything that makes you feel good. Then what's left...
I'm definitely not saying I'm the best person to tell you how to fight these voices. In fact, I'm really the last person you'd ever want to come to. I'm great at telling other people how amazing they are and how beautiful and loved they are. When it comes to myself, I just can't. All I see is bad, all I know is beating myself up. I refuse to even listen when someone tells me I'm beautiful or anything like that. But I do have suggestions.
1. Don't listen when people say negative things. There are always going to be people out there that want to put you down. You know what? they aren't worth your time, or effort. If they are there to make themselves feel better by making you feel worse, you don't need that.
2. You time is important. Even if you think you don't deserve some time to yourself to relax, give it to yourself anyway. being stressed out all the time drives a person to do some crazy things.
3. Ignore the voice. This is the hardest. I'm not saying you will be able to block it out totally, and there will be moments in your life, unhappy ones, that the voice springs up and attacks you. Just tell it to go away, surround yourself with people that can help, and attack back.
4. Lastly, Don't give up. I really mean this one. Life can suck at times, and you can feel down in the dumps, but there's always hope. A friend of mine once hold me that hope is something you choose to have, and not something you can lose. So hold on, times can get tough, and it can be too hard to handle by yourself. Get someone to help you, talk to a friend, I don't know, anything.
Sometimes everyone needs a reminder how beautiful and amazing of a person they are. Sometimes they brush what you say off, but it's all that little voice in their head telling them (or you) that they/you aren't good enough. Just hold on, and remember, someone loves you.