For the home and the quantities I cook for at home, I find that either two forks, or using my hands (in latex gloves) will work.
If I'm at work, and doing restaurant quantities (like I did earlier this week), I simmered roughly-cubed leftover roast beef in Au Jus for as long as I could. Then I just strained the meat out, put it into the bowl of a stand mixer, put on the paddle, and let it run for a minute. That meat, mixed with some enchilada sauce, was EXCELLENT and the enchiladas got rave reviews.
Peace, Love, and Vegetable Rights!
Eat Meat and Save the Plants!