How can I go about ranking this niche? (not showing niche in thread)

[​IMG]

After awhile of searching I have finally found a niche which has good click ratios, decent traffic, and mild competition how ever this is really my first site of this kind and I am wondering what approach I could take in the white hat world to start indexing for these keywords.

Outside of guest posting what are some other viable methods for getting backlinks + other SEO methods? Thanks!