Cockatoos are birds that make their owners think. You have to have an ability to think outside of the box to prevent and deal with problem behaviors and keep them entertained. A lot of time spent living with a cockatoo is spent thinking about how to make their life better and trying different things. This isn't a pet that its enough to love them a lot and give them snuggles. Its not enough to go to the petstore and buy a bunch of toys. As a cockatoo ages, they tend to get a little jaded about toys. Been there, done, that...boring. So they will sit with a cage full of toys and look bored or if allowed to go on for a long period of time they will resort to feather picking. A successful cockatoo owner notices what the bird plays with and rather than going out and buying a bunch of random toys to stockpile, they focusing in on what the bird is actually enjoying. Usually they make a lot of toys themselves and do a lot of foraging toys. Get used to power tools, a good skill saw and hand-held drill will be your friends. You might have times where you go to the hardware store and spend 45 minutes just staring at all the stuff and wondering how you can use it to make a toy out of or somehow rig the cage to be escape proof. Thoughts not about snuggling or love will invade your thoughts while driving home from work. Things like, 'gee I've noticed Cuddles has been preening and awful lot lately, what can I do to prevent this from becoming an overpreening habit and is this behavioral or medical and do I need a vet check and then going through the logical list of evidence that might lead you to diagnose the problem as behavioral or medical and deciding what needs to be done tonight in the toy department to make this not a problem tomorrow or call the vet.' This might result in multiple trips the grocery store to get coffee filters, plastic straws, Walmart to get wiffle balls and various other potential toy supplies and then spending a few hours randomly putting things together and seeing if your bird likes it enough to take its mind off of any abnormal or obsessive behaviors that you've been seeing. Taking it for trips through the drive through and to visit friends to give it something to think about. Possibly building an outside enclosure so it can get a little sun and have something else to look at other than the same walls. They are time consuming in that they accupy both your physical and mental time.
My daily routine with my cockatoo is get up and give fresh veggies in the morning then inspect her cage and maybe thow in a foraging toy or something before I run out the door to work.
4pm get home and do the cooked veggies and cooked bean and grain mix. Maybe let her out of the cage for some supervised independent play during which I can't leave the room unless I want my electrical cords to be severed.
8-9pm snuggle with the cockatoo. 9-10pm make new toys for the cockatoo, clean dishes and refill with the nightly rations of seed and pellets.