The best treatment for ticks is not the best treatment for fleas, in my not-a-veterinarian opinion.
Fleas are nasty. If you get an infestation, you'll know it sooner or later, and when it gets bad enough, the fleas will bite you (but they can't live off of you). You'll see them, they are small black creatures, about the size of a small sesame seed. In my experience, *everything* the animal regularly comes in contact with needs to be treated, as well as the animal. Fleas will live in carpeting and bedding.
Ticks are a lot easier to deal with, at least in my area (common tick species can vary). One can simply pull them off, which appears to be the recommended method (for humans at least).
But check with a vet *first*. They'll know what's common in the area, they can check your pet, and what the best course of treatment is.
If your pet is regularly getting fleas, you need to talk to your vet about flea prevention. This may not be the same thing as flea treatment.
If you're pet is regularly getting tickets, not only do you need to talk to your vet about tick prevention, but you need to learn about what human-transmitted diseases ticks can transmit in your area, and how to limit tick bites for yourself (wearing light colored clothing, sticking pants legs in socks, etc). Some tick diseases can be pretty serious for humans - rocky mounted spotted fever and lyme disease are no joke.