Mum diagnosed with advanced Liver Cancer

Hi everyone, this is my first time positng on one of these forums. In October of this year my Mum was diagnosed with Liver Cancer which we have been told is incurable. They have started her on some drugs to hopefully stop the growth and prolong her life but it has left me with some questions. How do you make the most of the time you have left with someone when you know its limited? It seems that it will linger in the air of any nice thing we now try to do, but i don't want us to not do nice things in the time we still have. Does anyone have any advice? I'm 20 and my Mum is 53.