It’s almost 11 a.m., so you better stop what you’re doing, leave the class you’re shopping, and zig zag across Harvard Square to get to Zambrero on 71 Mt. Auburn Street. The “healthy Mexican” chain with a strange name ending in -o (not to be confused with Boloco, which previously occupied the same spot), is offering up 1,000 FREE BURRITOS today. The offer will be on until they close at 10 p.m. tonight, but judging by last March’s Free Burrito deal to mark Zambrero’s opening, those babies are likely to go quickly. So what are you doing still reading this?! Get to Zambrero and fuel your busy day NOW.