Essentially, you should only use bookmarking services once in the entire lifetime of the particular page in question. When you are posting new content articles or added some new feature to your page, you can use bookmarking services to bookmark those specific areas though and it should be the only time you're using bookmarking services as bookmarking your main level domain over and over again doesn't benefit you much.

Most people say to stick to the top bookmarking sites but there are some hidden gems out there so it's worth the time to take a look and find them for your particular niche'.

I suggest you to use ONLY the TOP 10 DO-FOLLOW bookmarking sites. They will help you in your search engine result page and some extra traffic.

It's a good practice not to do much of it in a day. We should do it very carefully so that we won't make it spam which is again harmful.

U should actually do as many as possible,