Paddling sidewise to wind waves, swell, or both. With a long section of cross beam waves you can choose to work/surf diagonally, possibly going more aligned to catch waves then cutting diagonally once you are on waves, and/or you can zigzag doing runs with the waves then going sideways or even upwind slightly for a distance before aligning with the waves again. In open ocean paddling it is not unusual to be able to work with smaller wind waves going more your way than the dominant swell.
Reivers Dustin: “…On those side-beam things you have to be able to wobble and bend but still have enough pull to keep boat speed. Can't be bracing, you gotta adjust on the fly with your power strokes. Once you stall, then its just so hard to get boat speed again…” (Editor Note: Reivers is talking primarily about keeping your speed up when you are actually going downwind, not the parts where you are going up wind at the start of runs, or sections where you are going purely cross beam where you are getting no push from the wind or waves, although maintaining some momentum is usually better in most situations)
Some tide races (see tide race videos), if you have the skills and prep to paddle in them safely can also provide plenty of side wave action to play and practice in…
Lake Lucerne, Switzerland Not only beam wind, but going upwind/upwave also
Sydney Harbour, NSW, Australia Long traverse across beam wind and waves before getting to turn and go with the waves
Skälderviken, Sweden - Leif Davidsson: “very technical paddling and most of the time crossing waves”
Sawtell - Coffs Harbour, NSW, Australia
Ostsee, Germany Ostseecup, low braces on left, high braces on right - experienced whitewater paddler
Western Cape, South Africa Jasper Mocke Working Cross Swell
Risor, Norway Nordic Surfski Champs 2021
Börgerende, Baltic Sea, Germany
Botany Bay, Sydney, NSW, Australia Another Option - Leg Out Just When Wave Breaks
A common scenario, particularly at the beginning of runs when paddling out before lining up with your downwinder.