I agree with Somarco, with one exception, especially since I'm more on the P&C side.
The big part of 'making it' in this business is having enough residual income coming in that writing new business isn't as important. This is far more true in P&C than life/health, since residuals are higher, though initial income is lower.
To get to this point requires 3-5 years, but it's a transition. After 2 years, you'll have a really good sense of the business, should have a comfortable income stream (albeit, maybe still struggling, but paying the bills). Most importantly in those first 2 years, you'll have dealt with enough situations that the business side is second nature, you'll have figured out your niche, and how to work.
You should be starting to get into a 'groove' now, but you'll get knocked out of the groove a few times, and then settle back in. The groove gets deeper as you go along, making it harder to get knocked out.
My normal groove is to market P&C, cross-sell health. Earlier this year, the groove became a rut, so I decided I'd do something totally different, market health, cross-sell P&C (after all, I am adventurous). Hmmm, bad mistake. I had no groove at all. I went back to my rut