I would give them (aspiring writers) the oldest advice in...

I would give them (aspiring writers) the oldest advice in the craft: Read and write. Read a lot. Read new authors and established ones, read people whose work is in the same vein as yours and those whose genre is totally different. You've heard of chain-smokers. Writers, especially beginners, need to be chain-readers. And lastly, write every day. Write about things that get under your skin and keep you up at night.