Put the sponge down and step away from it.
Get yourself a nice lambswool washing mitt. So soft and infinitely better for your paintwork than a sponge which will give you big ass swirlies in the paint.
Personally I don't like Megs stuff so I would recommend Poorboys World, Victoria Wax and Clearkote products as your basic set up, as they are competitively priced and good for your money.
Shampoo - Poorboys World Super Slick & Suds
Clay - I have Clearkote clay with their Quick Detailer too
Microfibres - Start collecting them really. They're useful for in the house too. You can use them anywhere. Good place to get them can be Asda and the like.
Drying Towel - Get a good waffle weave drying towel - Sonus, Poorboys etc
Polish - Again would recommend Victoria Wax, Poorboys etc. But there are a huge range of polishes to suit the varying differences and damages of paint so you'll have to have a google and a read up.
Wax - For this weather I'd recommend Collinite No.476 as it's very durable and will protect your paint throughout the harsh winter climate. For the summer I'd probably use Victoria Wax Concours Red as it's a fantastic wax that gives a darn good, natural finish and also good levels of protection.
To be honest my list is a quasi-basic compilation and perfect for those just starting as it's exactly the same as I used to do, before I got introduced to a world of machine polishing.
Quick Detailer is awesome lol. If you don't have time to do a full detail you can just wash, dry and Quick Detail. Job's a goodun! You can also dilute it to get the more out of it and can use it to clean phones, laptops tvs etc. Good stuff.