1: paint the ceiling/wall edges first with 3" brush - pain and time consuming but makes the roller part a lot easier
2: use disposable rollers (9 inch B and Q long hair are fine - under a tenner for pack) - then when first coat done just pull it off the roller, roll up in news paper and bin - then no messy washing of rollers -
3: second coat next day - same process as before
3: make sure than when you are applying the paint you do not roll towards the nearest wall as any splatter will end up on your freshly painted walls
if painting white - silk emulsion 10 litres costs £15 - £20 and is own brand is fine (make sure its not matt emulsion)
Funny, I prefer Matt on ceilings (hate shiny ceilings)
Crown matt white (premium) goes on creamy but will dry brilliant white.
Done 5 room's getting ready to sell. What a hateful job.