Many of you heard about directory submission. It's a well known, thoroughly tested method of obtaining one-way links. While some argue the efficiency of directory submission nowdays, I'm a strong proponent of the technique, basing my support on just facts. If you can get your site some PR and traffic by directory submission alone, it works by my definition.
Obviously, many tools are available to help you with the submission because it's a tedious process; you need to submit every site to thousands directories to be accepted in a few hundred of them. While many tools do a decent job, the ones that are automatic can actually give bad results because they can mess your submission and you have no way of checking live what's going on. You can get rejected from all directories because your shiny directory submitter sent your Health site by mistake to the Automotive category (I've seen this a lot).
If for you time = money, the best solution is to outsource the activity. Manual directory submission services, like the one offered by Pro Link Directory are guarantee to be carried out by experienced professionals who not only work in search engine optimization but also manage link directories. You don't even have to provide all your site details, they can choose what's best for you. Manual directory submission is very straightforward: a real person goes through a list of directories, one by one and enters your site details. They then check for a verification email and click any links required to activate the newly-submitted listing. It's a simple but tedious job, worth outsourcing!