Look to see if there are any gaps in the market......I don't know Poland like bubba does because he is there already , in the business field.
But I noticed someone was asking after yarn and thread shops............if there aren't any, you could set up shop over the internet, buying the stuff direct from the manufacturers and selling online to people. Thing is you need a bit of knowledge or experience.
Look for opportunities, they're right under your nose..........:)
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It's true.....
There was nothing behind that comment directed anywhere.......in my experience, of which I have a little (well a bit more than little) that fact is true.....
And you can learn so much by listening to people who have their own businesses.......doesn't matter what the business is, small, medium or large :)