How do you start off a song?

[DiGiMusicLabelz]

I used to be able to write a song off the top of my head without music.Now days I base my lyrics around a track I found. I miss the old days when I was able to create a melody in my head and tell a producer how I wanted to the track to sound. One day I will sit and try to do that ole school skill, it just takes so much more energy and effort:confused: