How can we focus on actual demand to achieve higher forecast accuracy?

forecasts can't get percent accurate ever. However, it can be improved through applying better technique of smoothing time series and increasing the quantity of the historic sample data

Increasing forecast accuracy is about the harmonisation of 

* Good understaning of sales data,

* Being aware of recent changes ın environment and at competitors,

* Having concrete knowledge of the product/s. or product groups

With application of statistical methods, selected upon product and ıts demand, and jugments of forecasts, you can increase the forecast accuracy