Part of it is having the right tools. Now I have pressure bleeder it's so much easier to blow a bit of fresh fluid through the brakes and clutch, so I do so. Not like the old days when it was left to marinate in there for the lifetime of the car. Similarly, now I have a gear oil pump, topping up or refilling the transmission is a whole lot easier, and quite satisfying too. Once upon a time it was hard work trying to squeeze it into a filler hole between the transmission tunnel and the gearbox casing but now it's easy.