I have £20k in a LISA account and £7k in an aviva old workplace pension. I'm 45 and aware that this is nowhere near enough for retirement. I'm self employed and due to get full state pension (assuming it exists when I reach that age!). What's the best way to boost my pension - should I prioritise the LISA over the aviva? Or vice versa? And how much should I be putting in my pension each month given no employer contributions.