It all comes down to a few steps; clean, sand, prime then paint. Technically painting your cabinets is no different than painting any other surface.
Here's some good resources that will get you going.
<a href="//questions.house-painting-info.com/painting-a-bathroom-wood-vanity.html">Painting a bathroom wood vanity.</a>
<a href="//questions.house-painting-info.com/how-do-i-paint-oak-cabinets.html">How do I paint oak cabinets?</a>