I was fresh out of school as a developer when my mom's (terminal) cancer came back from remission. It was really difficult to focus 100%. I spent all of my vacation time from when I found out till her passing visiting her.

For myself, I tried to bury myself in interesting work as much as possible; but that will only get you so far. I made a point to make as many memories with her as I could. Those activities and trips I didn't think were important became the utmost priority. It also made me realize how much I didn't like my job and where I was living, it was a period of reflection - not just on my relationship with my mother, but if the career path I was on was something I actually enjoyed.

I'd recommend just being as available as possible and trying to have as much quality time as possible. Hopefully she beats it, but I think you should remember that any time you have with her going forward is borrowed time. Make some great memories with her, take lots of pictures and videos! Learn about her childhood and her parents and grandparents!