What is the best way to tenderize beef, like steaks

Here is an article on various methods of tenderizing meats.
How to tenderize meat

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tenderize meat - Google Search

I use Italian Dressing, marinate it for at least 1 hr in the fridge, works great for chicken too.

I like to marinate steaks in diet coke. Just pour the diet coke over the streaks so they are completely covered (about a liter). This imparts no taste but really creates fork tender steaks. I like to let them marinate over night in the fridge.