Pick them up, read them again, and adjust to your current state of mind.
Recycle and reuse when possible!!
Sign up for a writing course at your community college or online for a basic writing course. Read books and practice grammar if you need that too. I would say, first find writing groups for they can give you much support and inspiration. Continue to review your writing pieces after you get feedback.
You can join writing groups on Yahoo and post your request there, see if you can swap similar projects with other novice writers.
Good luck in all your endeavors!
There is a time and a place to build a fire, and consign the poor writing to the flames. It is then purified, and lives on as the initial dream, unsullied by the poor prose or dialogue or whatever the problem was.
Find a good friend, and select a few pieces that you think are good and share them as
soon as possible.
If your instinct has been not to show them to anyone, then file them for posterity!
Retain them as nostalgic mementos.
Create work. Show it to a 1000 people. Great things happen only when you share what you wrote with others. There is somebody in this world to appreciate what you did if you really wrote something worthy. It is your duty to reach them and promote your work today. There are above six billion people in this world. All of them do not search for you and your unknown work if you sit silently in your home expecting others to explore you on their own. Keep your works accessible to those that love creative pieces. Be in touch with people, bad or good. Learn lessons. Gather insights. Move forward with intelligence, discretion and vision.
I'd recommend that you read them again, revise the bits that you no longer like and make all the other corrections you find necessary, and present them boldly to an audience/try to find a way to publish them. A person is not eternal, but a person's creations always have a chance to live forever, and the result of one's creative genius should have a chance to shine and gain publicity.
You should keep everything you ever wrote. You might resurrect the work as it is or to rework it. It could be something you never use again but it's all good for learning.
That's entirely up to you; I have things I wrote years ago, that remain sequestered. Good or bad doesn't matter; I just don't feel like taking the time to post them online. They were then, and not necessarily part of the 'writing voice' I use and am comfortable with today.
Show a close friend that you trust, make any changes you wish to and share them with the world! There's no point keeping secrets, you only live once.
Save them for a while. After a few years, go back and look them over again. Sometimes, there's this rare find in something I've kept that I will never show anyone, but can use. If it doesn't strike a cord with you the second time you look, then you can throw it away. Sometimes though, I keep it and look back a third time, but usually never again after that.
Start a blog , keep journals , write for yourself first. Dust some of them off , polish them up and send them somewhere!
Keep them buried. People want to know "What have you done for me lately?"