indexing

//may this is duplicate i am using rss feed for my website,the rss feed is create from php and mysql dynamically; i read that rss feed is help in indexing; now, my question is how i know that search engine is indexed my pages using my rss feed so i only include new content in next rss feed;

I'm working on a website and got problem with irrelevant indexing of pages and thus my ranking drops. It's due to 301 redirection , so should I remove them ?

I have daily analysis on the same topic so I am not sure should I allow indexing these post each day or should I remove them from indexing to avoid some problems in serp rankings? I am asking because the daily analysis covers the same topic each day.

There are places like Pingler and PingFarm where you can ping and even index your blog post if you choose. I've heard people say you should do this with every new blog post. Do you feel this helps to get your post indexed in the search engines any faster? I'm certainly not an expert in this...