take foot off gas, take off easy, start braking well before stoplights/brakes, etc.
there are really no items you can add that will help you regardless of all the hype. since your truck is no new, there really isnt anything that you can replace either.
here is my fual tracking, as you can see, its not that great (click on badge)
just follow their gas saving tips except for the cold air intake one because it does nothing for a Ranger
2014 F150 SuperCrew XLT 4x4
275/65/17 Falken Wildpeak AT3W | Shorty Antenna | Tinted Windows | ProClip Phone Mount |5.0 v8 |Tow Package | Oxford White
Sold/Totaled: 2006 Ranger XLT 2D SuperCap 4x4 Torch Red
15x8 Pacer 164P Polished Wheels | 31x10.50 BFG ATs | Level II Tow Hooks | FX4 Red Insert Seats
Tinted Windows | 6000K HIDs | Kobalt Low Profile Toolbox | Pioneer Speakers