Well when you see the psp game thing at the top sometimes it says where a carrot is hiding. Other times like 4 carrots pop up and you have to drag them into a basket. And other times you can steal them from people. You just have to search around. Good Luck :)
If you see a basket appear at the top right corner of your screen, start searching for the carrots as quickly as you can. They are only on your screen for a certain amount of time, before they dissapear.
Once you find the carrot, click onto it and drag it across the screen and drop it into the basket - you now have 1 carrot. Repeat over and over and over - lol. It is addicting.
It is funny because when you start to get into it, it doesn't matter what you are doing or typing...when the carrots and basket appear on my screen - all else stops just so I can collect my carrots.