Some approaches for organizing your deleted answers have been suggested in the comments. However, it may be of interest to discuss the underlying usage pattern.
According to the Stack Exchange model, you should not delete answers unless they are rude or they don't answer the question. The "not an answer" category is quite narrow, it only contains things better suited as comments or follow-up questions, and answers that do not address the question at all because they are about a completely different and unrelated topic. Specifically, an answer that is bad/suboptimal/worse than another answer/a horrible hack is still an answer and it should remain on the site. Through comments and (lack of) votes it will be clear for everybody that there are issues with an answer and possibly another answer is better.
You could argue that when you know your answer is not good and/or another answer is better, it is sensible to delete the answer to prevent harm or confusion. However, it could very well be the case that your approach can help some future visitor with a similar problem where a 'best practises' answer does not work at all for some reason, or a best practise would work but is rather overkill, or the future visitor gets an idea from reading your answer that can put them on the right track. And even if your answer is completely wrong (for example suggesting {\it\bf Try this}) then somebody will leave a comment that it is wrong and the future visitor will learn that they should not use that.
Therefore, don't delete your own answers, they contain knowledge that is useful to preserve. This applies to users with 26k reputation and 7 years of experience who have demonstrated time and time again to be knowledgeable, but also for new users that are just starting out.
