Few tips in no particular order.
Get some more pages wrote. Do a page for each service you offer, and SEO them all.
You have a web presence, which is good. However your using a gmail email address?. Doesn't give the air of professionalism.
No physical address shown. Again doesn't give the air or being a pro.
No land line.. See above.
Get some more content wrote.
Start a blog, and SEO each blog post.
Have a look through the advertising critique sub forum. Read and digest the posts here.
Check out some other members web sites, see if they can offer you any guidance..