There's gonna be loads of conflicting advice here. As a kid I used to drip lighter fluid on them whenever I found any on my ferret, the tick apparently breathes through its skin so would suffocate, turn black and fall off.
I've since been advised this is bad because it can stress the tick and cause it to secrete unpleasant stuff back through its mouthparts into the host animal, so I use a tick twister now. But if you're handy with tweezers you could use those. You need to grip the tick near its mouth and gently twist and pull it away, don't pinch or otherwise squeeze the main body.