Hi
Miguel,
I use this pipette bought from a Japanese pound store which comes with reservoir to transfer water or thinners to the mixing pallette...
...since using it I have saved on thinner and not made accidental drops. I used to use the rubber topped ones but the thinner fumes degenerated the rubber.
For paint I just use a paint brush to transfer to the pallette. Pallettes are MacD disposable ketchup dishes for acrylics and minor touch ups.
For airbrushing I normally use medicine bottle plastic stoppers as they make nice small recepticles just enough to fill my
airbrush cup. For large amounts of paint I mix them in Fuji film cups as they are transparent...don't know if you can still get them. The other kind of mixing pallette I use besides the wet pallettes are mini school pallettes that I cover with kitchen foil. Whenever it's covered in paint I will just throw the foil and rewrap the pallette.
For stirring it's either the paint brush, cocktail sticks and occasionally the stainless steel flat paint stirrers I got from Japan If I don't forget that I have them.
There's no fixed way of mixing paint but the guys have given some tips on the simplest way.
Cheers,
Richard