Aim at bad indexed state of my site, many people suggest that you should add new content to the site, update the sitemap.xml and make Google know the update of the site. yes, I always do this, However, I am now puzzled that should I update the sitemap.xml everyday and resubmit the updated sitemap.xml to Google everyday through Google webmaster, the premise is that new content is added to my site every day.
Like every 1 is saying No need to submit sitemap everyday
if you are adding other url or redirecting some url to other url
or some techical changes then you can submit it again
Yes, you can. But also keep in mind to link the freshly built pages within your site sufficiently. This way G. will find them following the internal links.
If you didn't get the indexed your site from sitemap.xml then start to bookmark your site in high PR websites. I think you will get the result from it.
Bookmarks