You get the lowest price by having a bundle. A double, triple, or quadruple play with each one lowering the overall cost for each service.
I have a triple play bundle with cellular service, Ultimate HD, and the 35/35 INTERNET tier.
I get $75 off the normal price. If I took off the cellular I would get around $60 off.
Of course you can also save by getting the lower HD and INTERNET tier. But you will also be missing some channels that you might want.
And if you are a new customer to FIOS you can even save alot more. And you can usually get an extra $5 or $10 off a month by signing up online too.