Rather than sit there doing nothing, take a look through these five ways to figure out a next step. Different ones will work for different circumstances and personalities. But if you have a negative reaction to one, don't necessarily dismiss it – it might be exactly what you need.
Do the Opposite
Seinfeld's friend George isn't the only one who can succeed in life by doing the opposite of his first impulse. If you feel stuck, then probably what you've been doing up until now isn't working too well. Rather than doing something completely unrelated, put some thought into it and find something about what you've been doing that you can reverse.
Have you been trying to make sales by phoning people? Write letters that give them a reason to phone you.
Always falling for the wrong person? Go out with someone you don't think of as your "type".
Yelling at your teenager and making no headway? Talk quietly and find things you can agree with them on. (The shock may make the teenager think.)
Whatever you do, break the pattern, because the pattern clearly isn't working for you.
Ask Mr Webster
A classic method of provoking creative thought is to grab a dictionary, open it at random, stab your finger down on a word, and then look for how that word is relevant to your next step.
Because there's an Internet tool for everything, you don't even have to get off your chair and find a dictionary. Just use a random word generator.
I just got "absence" as my random word. That leads to the thought: What am I doing now that I can leave out, as a creative void for people's thoughts to fall into?
Find Intermediate Impossibles
The phrase "intermediate impossible" comes from Edward de Bono, and it means something which isn't a solution itself, but which could lead you to a solution. His classic example, to deal with a polluting factory, is "the factory is downstream of itself". This led to the idea of putting the factory's water intake downstream of the water outlet, to give the factory an incentive to reduce pollution.
Write down all the things you can think of that aren't solutions. Now pick one and think: If I started off in that direction, where might I end up that would be a solution?
Do Good By Stealth
One of the best ways I know to get unstuck on one project is to set it aside and work on something else. Preferably, work on something else you've been putting off, and wait for the good idea for the other project to sneak up on you while you're not watching.
It's as if, when we're paying attention directly to the problem, we're holding it too rigidly in our brains. When we let go of it a bit, it can shift into a form in which we can solve it.
Eat a Spoonful of Elephant
How do you eat an elephant? One spoonful at a time.
Think about a big goal you have. What's a small thing you can do right now that gives you traction in the direction of that goal? It doesn't matter if the goal is a thousand miles away and you're taking a single step. Taking any step at all will at least get you in motion, and taking a step, however small, in the direction of an important goal gets you in motion in a direction you care about.
It's a lot easier to keep moving once you've started.