How to optimise my website in google?

Hi

I created a website to help people/businesses who need to exchange currency https://www.currencyexchange-advice.com and have had some fun with it, as i haven’t created a website for years.

I would like to think my site has been a success so far as have has people come through it, but i do not seem to be getting much google traffic.

i get most of my traffic from direct link or affiliate sites. i post a market update daily and summit to twitter/digg ect

If you search for currency exchange advice, my mixx/digg posts come up on the first page but my actual website is down on page 21

i have a basic knowledge of Seo so when i wrote my website i based it around questions people might ask Google. i.e where is the best place to exchange currency

i have set up my all in one seo package for every page and post when i started, using keywords that link to the title and text

is there any advice to get my website up the Google ranking or software that will do it for me?

thanks in advance