Get yourself a timer, and use it. Great for toasties (2 mins each side on mine).
When I first started using ours I'd put a peg on the tea towel on the rail to remind me I had something in the ovens. Its easy to forget if you are busy as there is no smell.
Buy bacoglide. I have two cut to fit the hotplates for frying eggs, pancakes and for toast. Never bothered with a rack toaster just used bacoglide.
Aga saucepans are stackable in the oven, look divine but are very expensive. My Stellar saucepans work great and if I need more space I decant into my pyrex stuff which is stackable.
Also the Aga grill pans sit on the runners which saves space but are again expensive so I'm still using my grill from our previous house which sits on the shelf.
Mash potato so much easier, no more waiting and watching that it doesn't boil over. Bring to boil and then bottom oven for 20 mins. I don't drain mine. Same with pasta, carrots most veg really. Swede does take the longest so I start that first.
Echo what pp said about never having a cold cuppa ever again.
I adore mine, inherited it when we moved nearly two years ago.