I've got a small budget (£500.00) for SEO, my site is currently at the top of page 4 for my targeted search phrase. Its been up and down over the past few months topping out at the top of page 3. I was planning on spending the £500.00 on directory submissions, I would prefer UK directories, like Yahoo and BOTW. Is this a good investment and which directories are best? I've been working on forum posts, blog comments, article submission, and free directories, I'm still waiting to get into DMOZ but we all know that could take years!!! Thanks.