So first off, I'm tackling the preparation and with that, I mean sanding.
So once you've filled any holes etc., hubby used Polyfilla for Wood; we then used a sanding block attached to my hoover, its called Mirka Abranet Professional Starter kit. You can buy it off Amazon and it really was a life saver, and cut down the dust so much.
I used the 120 grade sanding sheets to rub down the filling etc., then moved onto 240 and finally the 320 for an in between coats.
Next came Tack Cloths. These are slightly harder to come by, I got a few packets in a paint trade centre, and I grabbed the last few packets, but if you can't get hold of them, a very lightly damp cloth does the job. Just make sure you've really wrung it out well. Tack cloths are a godsend to get out an dust or particles left after sanding. I also use these for in-between sanding of paint coats.
I really would suggest getting their tester pots. Colours look so different in different rooms and light, what you may like in someone else's house, won't look the same in yours.
So there you have it, just a few tools of the trade, that really helped me.