Another thing I've found helpful when going crosswind in strong winds is to flatten out my stroke, so that the wind's effect on the paddle is reduced.
(I know that some paddlers reduce the length of their paddle too in hectic conditions when they have to go upwind. I guess everything that brings your centre of gravity inwards is good when the sea is rough!)
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...