label
{
    display: block;
    width: 150px;
    float: left;
}

<label for="nom">Nom :</label><input type="text" id="nom" /><br />
<label for="prenom">Prénom :</label><input type="text" id="prenom" /><br />
<label for="age">Âge :</label><select id="age" size = "10">
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>
<option>21</option></select>

<br />


<label for="sexe">Sexe :</label><input type="radio" name="sexe" id="sexe" />Homme <input type="radio" name="sexe" />Femme<br />
<label for="idees">Des idées pour mon site ?</label><textarea id="idees">Aucune, c’est le plus beau du monde :D</textarea><br />
<label for="newsletter">Newsletter :</label><input type="checkbox" />Recevoir
