Simple discipline technique - being positive! I used to give time-out after time-out and this is more effective for my 6-year-old. I count 1-2-3 before moving his name down to give him a chance to correct. And an end-of-day reward is great incentive to stay in the 'Happy zone'.
My consequence board we did for the kids last night. I have it hanging in the kitchen. And if they do something on the board, I ask them to go read the consequence, and that is their punishment. Time to straighten those two out.