Maximum contribution limits for 2015 are (these contributions are 100% tax deductible from gross income):
Individual - $3350
Family - $6650
Also, in 2015 the minimum deductible amount has changed to $1,300 for self-only and $2,600 for a family. The maximum out of pocket experienced a bit of a bump from 2014 to $6,450 for self-only and $12,900 for a family.
For those 55 and older, you may make an additional contribution of $1000.
For a lot of great information on HSA's, visit www.hsacenter.com.