Hot whites at 60 deg - white bedding, towels, flannels and tea towels. If no tea towels in the wash I'll include white cotton knickers.
Hot colours at 60 deg - coloured bedding, towels, flannels and tea towels.
Warm hard darks at 40 deg - jeans, school uniform trousers/skirts, any other denims, washable dark coats etc. Can put in some of dh's dark socks and ds's muddy sports kit (pre rinsed and soaked in bath) to make up the load.
Warm soft darks - school uniform jumpers, dark coloured t shirts, leggings, underwear, socks, tights, anything black or navy wiithout buckles and zips basically.
Warm bright colours at 40 deg - football shirts, pyjamas, underwear, socks, t shirts, tops in bright colours.
Warm pastel colours - as above but lighter colours like pink, grey etc.
Warm whites - anything white which needs a 40 deg wash rather than a 60 wash. Mainly school uniform shirts, t shirts and undies.
Dh's work shirts - usually go on 40 degrees because I worry about shrinkage. They are mainly checked/striped.
Delicates - mainly mine and dd's tops which can't go in with a robust 40 deg cottons wash.
Woollens
Bath mats - our white cotton bath mats go in their own separate hot wash at 60 deg.
Use big box bio or colours powder, depending on load, usually Sainsburys own brand. Any fabric cobditioner on special offer. No to dettol laundry cleanser bollocks.