Well, you have to classified your purpose separately because effectively and efficiency are two completely different things.
Please excuse to my low reputation and less experience in SEO for saying this.
I personally think that, anyway would be effectively efficiency as long as you genuinely and intelligently doing it. There are steps and procedures out there which are explained in very detail and simply to understand. So as long as your commitment is strong enough, anything will work.
For the offline marketing strategy, it depends on what sort of person you are in terms of "you are a social and outgoing person, or like to be in front of the computer screen".
The answer would be the response to the question of "What strategy that can make you enjoy the most?".
I really believe money is no longer important when you can please your heart with your service.
The superior man cannot be known in little matters, but he may be entrusted with great concerns. The small man may not be entrusted with great concerns, but he may be known in little matters.
Confucius