Or rather the facts and figures.
How much do you need? How are you supposed to know how much you will need?
I need to do some calculations about making up shortfall but don't really know where to start. I'm going to do one of those online calculations but if they tell me I'll get £xx how will I know if it will be enough. I keep thinking there msut be a sort of handy calculator ie aim for 50% of your salary. Or something?