What is an incoming link ? each time you link from within your own site to another page of your site, it counts as a link. And each time you link from one of your sites to another, it's an incoming link.
Why are incoming links important ? Incoming links are one of the most important keys to good search engine rankings. You can’t have enough of them.
How can you check how many incoming links your website or blog has ? The easiest way is to use Link Popularity.com. Type in your URL, then click - and you'll see links to each of the three major search engines (Google, MSN, Yahoo). Click on each and all the internal links will be listed. Note how many the site has.
Check out your competitors by going to Google, key in one of the keywords from your own website. Note the UTLs for the top 5 websites that come up in the search and then type each one in turn into LinkPopularity. Note how many these sites have. Then you’ll know what to aim for.
Of course if you are already on the first page..... keep up the good work !!