If you have Verizon, you'll want to check and see if you can take advantage of their new data prices today. Many of the pricing tiers dropped by $10.
Verizon isn't automatically giving existing customers the new pricing, but you can go into your account settings and select the same data plan for the cheaper price, and it will start on your next billing cycle.
$10 a month may not seem like much, but that's $120 per year. I can think of a few good uses for $120 to go to.