I'd recommend against flat tiles in my opinion as the paint spreads out and dries way too fast (especially if you're going to be using a lot of very thinned colors like he does in the DVD). I asked Lazslo where he got his tiny palette when I saw him in May but forgot where he told me. However, I did see someone at a con using one of
these and got some for myself and friends. I have a lot of the "flower" style palettes, and while they work just fine I like having smaller, deeper wells, since it slows the evaporation time greatly (especially here in TX). The large numbers of wells also means I can paint for hours without having to get up and scrub the palette, which suits me just fine

. Other than that, a porcelain palette from there or Dick Blick is a one-time purchase of around $7 that'll last you your painting career, as long as you don't drop them on a hard surface

.