This is a bit of advice that is always nice to randomly see, as it’s extremely easy to forget!
Back up your writing.
Email it to yourself. Put it on a USB disk. Send it to dropbox. Save it in a second spot on your computer, in case the first file gets corrupted.
Do something, anything to make sure you have more than one copy of your novel, or anything else you don’t want to lose! In the age of technology, viruses can always slip in and ruin files. Or you could move on to a new laptop and forget to bring over old files, losing an old piece that you might want some day.
So as a random, unprovoked reminder: Back up your files!