Reddit mentions of Royal & Langnickel 10 Well Round Plastic Palette

Do you fully stir your paints? Make sure there is absolutely no sludge in the pot, don't just give them a shake, get a kebab stick or piece of straight sprue and give them a really good stir making sure to go over the center raised bottom of the pot, there should be absolutely no buldge of sludge on the stick, just lovely thin paint. I must admit i haven't used humbrol acrylics but doubt they're too much afar from Tamiya's.

Perhaps your simply not taking enough out of the pot, are you brush painting or airbrushing? If i brush paint i use one of those art style paint pallete and just dip my brush in the paint and then into the pallete and then drop thinner from a pippette and mix with my brush. Here is the best acrylic brush painting howto i've encountered and i link to it often.

If you're using an airbrush i generally mix in the cup and take up two inch worth lenghts of paint in a pippette and then some thinner.

One of the Vallejo starter kits would get you a good assortment of paints, something like this. Brushes, I always buy locally from a "real" artists' supply store because you can't tell if they're any good from looking at the picture on a web site. I'd say start with a #0 and #2 round, and maybe a 5/0 dotter. Get some kind of palette, a roll of paper towels to clean your brushes on, and maybe some primer in a spraycan from a local hardware store, and you're good to go.