sweat monster like my sister.

mostly I just...well...sweat, wipe it off with back of the glove.

But if it's hot a simple headband's good, I like the coolmax like

http://www.teamestrogen.com/products.asp?pID=20881

or the terrycloth band type which I get at LBS, cheaper, more absorbant but they don't wick.

So if it's hot...then cold it's like a soaked towel around your head

My problem is glasses which they feel like they will fly off so I wear those sportsband things, hold them on.