Thinking about starting a new website, just wondered whats the most efficient way to go?

It will take 3 to 6 months to get the content ready so should I purchase a domain name now and stick a page up just to get it indexed or should I wait and launch the whole site when it's finished?

Any other tips would be much appreciated.

cheers

Personally I would wait at least until you have a minimum amount of content and the structure ready. I would put the site up when the site is made and I had one or two content articles ready. Then at least you can be indexed for content and keywords you want. Once this minimal site is up you can add content to it as you produce it.

I would go with what leonglass said. Put up some content that is complete so it can stand alone and then add more to it when it's ready. If there is some kind of age test that Google use on new sites and if the clock starts ticking when Google first encounter your site, then I think getting your site up ASAP would be a good idea.

Content is king! Dont let your text content to become old ! Do it quickly and start link building