I don't even think actively giving your apps to reviewers (and thus, trying to sway their opinions) is important. In fact, if you do this in an overly cheesy way, you might end up with a bad reputation.
Just create a valuable product and an informative web site for it (check out E-junkie, eSellerate, Kagi, etc. for sales mechanisms you can build into your site), then have your product listed on sites like MacUpdate (now that VersionTracker has passed away, MacUpdate would indeed be my top priority as a beginner), then have a little patience and listen very carefully to your users' feedback.
If your app proves useful and/or fun to others, revenue and reviews will start trickling in all by themselves. That's the time when you can begin considering active marketing, which could be based on favorable reviews, among other things. (Who doesn't like Macworld mice?

)
That said, if you're more interested in developing stuff than running a business, you can always try getting an existing Mac software maker to market your stuff in exchange for a share of the revenue.
Disclaimer: All of the above is heavily based on my own experiences. YMMV.