I know! Great, aren't they? 
You aren'tplanking for hours on end, and you don't currently need weights to do them, so just move them out to the evening when you're watching the TV. Swot I do occasionally if lifting gets the better of me.
You could also ditch the incline/decline bench and just up the weight on the flat bench, giving you more time and potentially more recovery. This also applies to the lateral dumbbell raises. But I'm no bodybuilder, so this might not be where you want to end up...

You aren'tplanking for hours on end, and you don't currently need weights to do them, so just move them out to the evening when you're watching the TV. Swot I do occasionally if lifting gets the better of me.
You could also ditch the incline/decline bench and just up the weight on the flat bench, giving you more time and potentially more recovery. This also applies to the lateral dumbbell raises. But I'm no bodybuilder, so this might not be where you want to end up...