The Powerball jackpot increased again after it remained unclaimed, but one lucky person won a couple million on Christmas.

After three months without anyone winning the top prize in the lottery, a ticket worth an estimated $1.22 billion was sold in California for the drawing Friday night. The winning ticket matched the white balls 3,

Just won millions in the lottery? Congratulations! Here's what to do — and more importantly, not to do — to avoid making some very big mistakes.