Before I used to just take what the job contributed for free but last year I maxed mines out for the first time.
IIRC HSA's are like IRA's on steroids because you never pay taxes on contributions OR (medical) distributions. Also, if you wait til you are 65, then you can use the HSA account like a 401K and just pay taxes on withdrawals.
If applicable it should probably be among the top of your list to max out because of the flexibility.
But I thought HSAs were ONLY for medical cost.