I usually try and use 50% or more of profits to improve my sites SERP positioning. I have done things like manual directory submissions, sponsored links, bought links, exchanged links, written articles as well as, of course, maintaining regular content updates Now I am at the point where I do not know the best way forward as it would seem that buying links is forbidden and subsequently my sites could get penalised. So the question is, where do i invest the money now? What are all you other SEO experts doing? Thanks a lot
Look out for a trustable SEO-Team and pay for consultation. Optimize your site for search engines & users. Make it accessible and improve its usability. Do it yourself or pay someone for it.
Have you tried growing your targeted keywords? Build links for your newly targeted keywords using blog commenting or social bookmarking
PPC\CPM advertising would be your best method, since your spending the revenue regardless you might as well "make sure" you recieve traffic from your investment. PPC\CPM can also lead to more backlinks because it generates more traffic that "could" backlink to your site.
as for me, consider the cpm based ads that can be found in the adbrite, adtoll and aductions.com a lot of good publishers are waiting for your ads to appear in their sites. please select the most ctr value