These are some random tips I got from friends, colleagues, family, strangers and myself. Hard to always follow but I try.

Always have a backup. Better two. Especially work files and photos. You can buy your music or movies again but not the stuff you created yourself.
Try a simple wallpaper and clean up your files on the desktop.
Always be nice. Karma will get you.
Get organised.
Be structured.
It's not all about the money.
Stop drinking bad coffee.
Look at things differently.
Do all things with love.
Don't be afraid to fail.
Seriously: Get a backup.

Something to add?