Probably the quickest way by far to increasing traffic to your site right away is to take a brief simple SEO training course from an expert.
It would be nice to either go to the trainer or get them to come to you. While online email training has its' advantages, the nature of SEO as a subject is such that it is best if you can meet your trainer face to face and ask questions where you do not understand. This is the best foundation for SEO. You can then follow up on it by regularly mining information online on your own.
Of course one brilliant way to do this is to recruit as many of your friends and colleagues as possible to take the course at your premises with you. TYhis way you can negotiate for a discount with the trainers.