Easiest would be to do directory submissions, article submissions and blog commenting. Reciprocal / 3-way link building is slightly more difficult. You can make some interesting and useful gadgets / widgets that people can put on their website (w3c validator) and they will link back to you ! --- I consider this to be the best. There are other methods like sponsoring themes etc. but those have been getting google penalties lately (if you overdo it).
For me, the best way to build link as below 1. Link exchange 2. SUbmit to directory 3. Comment on dofollow blog 4. Use yousignature in dofollow forum
1# Bookmark your website on the bookmarking sites. 2# Submit your website to a lot of free one way directories. 3# Create articles and submit only to the known article directories. 4# Create a press release and submit to major press release websites. 5# Comment on high PR blogs or quest books but make sure the links are (DoFollow) so it can pass the value 5# Contact related sites owner and ask for a link, however Reciprocal links are not as it used to be! Try 3 Way. 6# Contact blogs owners and ask for a free reviews you might get lucky and get a post with a link back. 7# Sign up with a lot of known forums like DP and create a helpful posts with a link in your signature. 8# Buy some high PR links... better from related quality websites and benefit very quickly 9# Do it again, and again.....
I recommended social bookmarking submission, blog posting and forum posting...It's really easy ways..I don't believe in reciprocal linking strategy so don't use it...Thanks