Whats the best way to get sites indexed by yahoo and Bing?

I have no problem getting my sites indexed by google.
But Yahoo and Bing are a different story tried bookmarking, submitting them, link wheels, articles. Some are indexed by yahoo or some by bing some take a day some its been months and still not indexed. Just can't figure it out other than some niches get indexed quicker depening on which engine it is.

Basically I'm asking is there any sure fire techniques to get a site indexed by yahoo and bing?

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ForeverNever said:

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what?

not sure if this was luck or not but for yahoo one of my sites wasnt not indexing after several weeks of being up. i looked it up with sitexplorer.yahoo.com and it found my backlinks but not the site itself lol. A couple days later it was being found in yahoo.

I hear domain aging is much more important to Yahoo than to Google, so if you just register the domain, adding a few years to your registration may do the trick. Also, believe it or not, keyword density is still an important criteria for Yahoo.

Don't know much about Bing though.

Funny...I experience just the opposite. I get indexed quickly and highly on Yahoo and Bing, but have more difficulty with Google.