Many Americans try to earn a little extra cash during the holidays by taking on a part-time seasonal job. Problem is, the sluggish economy is taking a toll on companies nationwide and seasonal work may be harder to find this year.Many retailers are expecting to offer fewer jobs this year. Maine-based L.L. Bean expects to hire 23% fewer positions than last year. And national numbers released last month by Manpower ( MAN) indicate that 72% of employers surveyed are either cutting jobs as they head into the holidays or keeping their payrolls unchanged. If you are hoping to take on a second job this holiday season, here are a few tips to help you with your search.