Pop Psychology will ask you why you are struggling, wait for your answer, and suggest you look deep inside your self for the solution. If you find nothing there, they resort to, look deeper . Christ exhorts us to look to Him, the author and perfecter of our faith, for our needs and for our example. Christ is King of self-denial, and as already said, our example. From experience I would say struggle, struggle, struggle, but that really helps little.
Lets try to be a little practical.
Get a true understanding of yourself. To grow out of love of self is no easy thing. Do your best to fall out of love , is no mean statement when we are talking about the love of self. Most people will revolt to read that they are monsters in their nature, or vultures to themselves, but so we all are. If we really understood this, self-denial would be much less difficult.