For us all the really white seo methodes still work really well:
- Press releases
- Guest posting
- Commenting on related sites (valued comments, no spam)
- Asking our clients/partners to link back to us in related topics
- Running social competitions
List goes on and on, but there are lots of stuff you can do that dont cost that much (mostly time..)
But to get a agressive linking to the site we still havent find a way that worked as well the grey/black seo before the update..
We have also shifted focus more and more over to the social game.. Hopefully it will make the big difference in the future..
Good luck