I'd say the best SEO tactics involve a mix of on-page, quality link building and driving traffic through social media campaigns. Guest-blogging on relevant blogs can be a great way too.

Well if we talk about driving a traffic to your site, there so many ways to do it. From optimizing your On-site SEO, Link building, etc.. If you have more budget, You could just hire a professional SEO to do the trick.

Audit Your Site Framework
Data Research Via End-User Value
Create More Optimized Landing Pages
Make Your Site Responsive and Mobile-Friendly
Double Your Infographic Power
Spy and Target Competitor’s Live Keywords.

Focus on these activities!
On-Page SEO
Guest Posting
Video Optimization
Infographic
Forums
PDF & Document Sharing
Social Media Optimization

Well it depends on your marketing strategies. If you are just starting out creating a plan, a timeline and a marketing strategy is important whether it is for SEO or not. You also need to analyze your target market to make sure you'll get genuine traffic.

Backlinks from good sites