Dips and rinses may contain permethrin, pyrethrin or organophosphates. Shampoos help to primarily rid the pet of the ticks it already has on it, although some have residual activity. This is true of almost any medicated shampoo. Again, remember to protect the eyes and ears of the pet. Cats often do not like running water.
Shampoos often contain pyrethrin.
Collars can be effective, but must be applied properly. To get the right degree of snugness, you should just be able to get two fingers between the collar and the neck of your pet. Be sure to cut off any excess portion of the collar after you have properly applied it. Otherwise that animal or other pets may try to chew on the end. Check the package for information on duration of effectiveness since many collars lose effectiveness when they get wet, e.g., if your dog swims a lot.