I've been actively improving on this right now, and I credit high handicap games as white. If you're at 6 kyu, you're strong enough that you can give 9 stones to a player who knows their living and dead shapes, knows some basic tesujis, has some sense of direction of play. Who basically won't just be pushed around.
At first, games would tend to go like this: I'd put some pressure on a group. They'd expand elsewhere. I'd panic at all the handicap stones and try to severely attack the group. They'd respond with reasonable moves, and I'd do something like steal their corner, but down on the first line, and they'd get thickness that more than made up for it. Or I'd kill a small group, and they'd take sente and get an overwhelming lead elsewhere.
Over time I started tempering my play. With 5+ handicap stones, the game isn't really yours to dictate. Just make good shape. Push the opponent into bad shape. Connect your stones. Keep your opponent disconnected. Before I'd isolate a side stone and be reading all the ways I could make sure it died. Now I try to leave it at that: it's isolated, I succeeded. If he tries to form life there, just maintain pressure, looking for access under the group, keeping the eyespace from expanding. And then suddenly, the group would be clearly killable. When I jumped at undercuts and vital points, the group would live. When I ignored all that and just played sensible responses, the group would die of its own accord.