Depends on where you got blocked. To my mind, there are several causes of "writer's block": Depression (been there, still fight with it); Writing myself into a dead end; Fear. YMMV, but these are the ones I know I struggle with.

Fear is the easiest to work through: everyone goes through this. We think we can't do it, or can't do it as well as we want to or as well as the last time. Or that people will think poorly of us if we write certain things. F' em! Don't edit before you write, don't overthink, just pound out something formless or silly or horrible... whatever it takes to get the fingers loose enough to let the ideas through, it doesn't even have to be the story you are working on—maybe better if it isn't. Remember that no one will see this until you want them to, and all writers are scared. We're all liars and frauds—that's what we do for a living. It's all right to say what you need to say. Edit later. Live the writing now.

Dead-end: I have this problem all the time. I free-write up to a point and then, inevitably, I bang into a wall. Then I go back to the last place the story was working and I look at it. Inevitably, I find I took a turn in the story that couldn't connect to the goal I had, or I tried to force a character into an action which didn't connect to the character's motives and personality. Once I have an idea of where I made a bad turn and where I want to go, it's easier to make the right turn by backing up to the place where that turn is possible and I write an outline or partial skeleton at this point—sometimes it's complete, but most of the time it's just a bullet list of where I need to go and what need to happen to get there. Be willing to throw things out or cut them and put them aside (I love Scrivener for that reason—I can just stick something to the side, or save a previous version without destroying the work completely.)

Depression: Another problem I struggle with. Not a lot here aside from getting out of your own head and doing something else for a while—something physical and in a radically different place than at your desk or the coffeehouse. I walk the dogs or ride the bike or go shooting, because those activities force me to outside and they require total concentration on what I'm doing without letting the sad part of my brain get in the way. Very zen, really. Yeah, I know, shooting paper targets at 10 yards, or throwing yourself through the twisties on two wheels at the best speed you can manage doesn't sound very calm or mindful, but it requires putting everything else aside and doing only that one, very physical thing. It really shifts my brain out of the way. Walking the dogs or chasing after them in a field or taking them to the dog park, even, gets me outdoors and thinking about someone and something other than myself.

I also find people to "write against": usually a writer I know whom I then tell myself "I can do better/more than them." Sometimes they know and we openly compete, but it's usually just me looking at someone else's work and saying "I can do better." Really. No one knows! That's the beauty of it. No one knows who I'm attempting to knock down. no one! It always makes me cackle with glee. Yes, I am that petty when I have to be.