Monster Hunter Tri Bundle
For those newbies starting out, here are some useful item combinations to get you started.
Note that you will not find (or see) some of these items until a little later in the game!
Potion: Herb + Blue Mushroom
Mega Potion: Potion + Honey
Goldenfish Bait: Sneakbee Larvae + FireFly
Paintball: Sap Plant + Paintberry
Pit Trap: Net + Trap Tool
Shock Trap: Thunderbug + Trap Tool
Old Pickaxe: Stone + Bone -or- Stone + Mystery Bone
Tranquilizer: Sleep Herb + Parashroom
Tranquilizer Bomb: Tranquilizer + Bomb Casing