MOT?, signed up for reminders via txt (1st, if memory serves, is a month before).

Tax?, standing order.

Insurance?, they will get in touch before renewal date with price so you can either stay put or shop around.

Servicing?, most modern cars will tell you when they need servicing. Otherwise I suppose most (with a 3+ year old car) will have the service done annually at the same time as the MOT (which you can get txt reminders for).

For MOT and VED (car tax), set up a Driver and Vehicle Account on the GOV.UK website.

Insurance reminders will arrive via e-mail anyway a month before renewal. It is suggested that the best time to shop around is 3 weeks before renewal.

My car displays when a service due, but if you're relying on dates (e.g. annually) it's up to you how you deal with it.

Nowadays I put every event (family birthdays, one-off events) on a digital calendar as part of my Hotmail/Outlook e-mail service and as many as I know at the beginning of the year go on to a home-made (but very professional-looking) calendar which hangs in the kitchen. Everything is also written in my faithful Filofax.

I suggest the issue isn't just about how you organise your car admin, but how you organise your life.