Paul,
It can be slow in Jan & Feb, this is where being fully established comes into its own. I Know its more difficult in the early years, but should get better each year for you. I myself have enjoyed a rest doing about 50% of normal, but am just starting my new year marketing campaign and expect very shortly to be at full ahead.
Just keep working at your own marketing - the more you get the stuff out and the quicker (Providing its good stuff of course) the faster you will get your year going, and then maintain the momentum for long lasting results.
Dave.