You might be able to find discounted lift tickets to Winter Park at some of the local supermarket chains (e.g., around Denver).
Also, you might find the following trip report from Winter Park useful. I've been skiing there twice in the past few years and wrote the following report for DCSki after my last visit.
I really love Winter Park - it's a huge mountain without the pretense. It can be somewhat crowded on weekends, but is fine midweek. I believe it's one of the best values in Colorado.