Yandex

• thematic relevant inbound links matter
• link exchange networks (might) still work
• Yandex doesn't index:
  • forums
  • free advertising boards
  • guest books
  • e-newspapers
  • social networks
• Yandex ignores links from:
  • free hosted domains
  • third-level domains
• Yandex doesn't account for links from foreign websites (for their Russian engine, it does for their global one)