How Should You Plan Your Canvas?

Ignoring the basics was my biggest mistake when I started a big canvas. I wanted to put a lighthouse, cliff, rocks, and a beach. What I should have done was sketch it onto the canvas. What I did was just start slapping on the paint.

The result was an uneven horizon line, an out of perspective lighthouse and waves that didn't make sense. The sky has a bit of a transition problem, too. All on a large 3' x 4' canvas.

However, it needs fixing. A wise artist friend once told me just watching the work will go a long way in getting the brain to click and the answers to come.

So I'm staring...waiting...and knowing it will click sooner or later. I really don't want to give up.

Planning, it's all in the planning...

Next time I'll do the sketch first and maybe the outcome will be better. 

 How do you plan your canvas? Sketch it out or just slap on the paint?