What really strong ties could I present to the US consular officer for me to be granted the US visitor's visa?
Answer:
My first advice: don't make it appear as if traveling to the US is your sole goal in life. Consuls can smell desperation - and when there's desperation, there's a strong chance of becoming TNT (illegal parlance as in "tago ng tago")
Be confident. Project the impression that you simply want to travel abroad - and if you won't be granted US visa then you will travel somewhere else, say Europe.
You have a good job. You have strong ties that will prove that you will come back to the Philippines. Play up those features.
If the consul asks (and this is almost always the first question): "Why do you want to go to the US?" Answer in complete confidence that you want to go to the US because you have reached a point in your life when you want to travel, and that you have traveled abroad already so you just want to see the US this time.
This was my approach a decade ago when I first got my US visa (I'm also Filipino like you). It worked -- in fact, the consul did not check to see my employment certification or bank statements or land titles. Because I mentioned that I work as an economist in a bank, the Consul only asked me work related questions -- what was my economic projections for that year, what were my thoughts on the liberalization of the Phil airline industry (in fact, the Consul did not want to see my employment certification or bank documents, but asked me if I brought this report with me).
Be confident, and dress well. Show to the Consul that your life does not center around his decision whether he gives you the visa or not.