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?"
Collect all your work into a file and segregate them and show it to a friend or mentor who can read and give you and advice on how good your work is.
Polish them up and get them out.
Take them out one at a time and look at them with fresh eyes. Try to remember what first inspired you to write them. Judge them with everything you've learned in the interim to determine whether they are worth revisiting, or what you can learn from them. Try to read them as a reader first; then go back and reread them with your writer hat on; then try to read them as an editor.
I'd go back and look them over, revise if necessary, find an appropiate market for your writing, and sent it out. The worst thing that can happen is getting a rejection and the best is publication, but you will never know if you don't try!
Have the courage to show them off,everyone has a great story in them,it just have to be told,so pull them out and share them,keep all points of view in mind,but don't hold onto them.especially the negative ones.
Start a blog, or several blogs, just put it out there so whoever might find it useful may find it. Maybe put only excerpts online and try and get commissions for the full length version.
you better show it to others or it with them because it maybe an idea for them to engage in writing or they can acquire some knowledge from the things you've written.
Based on a personal exercise with the goal of getting to know yourself:
Read them from the beginning as though someone put them in your hand and said, "This is something I have written down, and I wanted to share it with you. Please tell me what you think." Read them as though the writer is someone other than yourself. Read them to learn about this person. Have questions, share tips, compliment, encourage, suggest.
Then after you have read it, think of someone ELSE with whom you would be willing to really share this. Just do it. God don't make no junk.
Show them to someone you trust. Someone that is interested in the type of writing you've done. What is the point in pouring your heart and time into something to have it hidden away and never shared? Get the feedback from those you trust and make a choice on where to go from there. I only let one person read my first manuscript before I submitted it and I haven't regretted the choice!!
Just keep them for memories. I do...