Combat
Do daily roulettes for gil bonuses
Farm dungeons for items, like minions or furnishing items
Verdant Partition furnishing, Drippy minion, etc.
Farm trials for high-valued materials
Byakko's Mane, Celestial Kimono Remnant, Pearl of Winds, etc.
Get on a hunt LS or hunt discord and do hunt trains and S ranks when they pop up
Hunts give poetics and current tomestones
Current tomestones can be used to buy and resell crafting materials
Farm FATEs in ShB and EW areas to get bicolor gemstones, then buy and resell items
Orchestrion rolls, crafting materials, etc.
Complete weekly Wondrous Tails
Get bronze, silver and gold certificates to resell items
Get treasure maps to resell
Do treasure maps to get pure gil and items to sell
Gather a daily treasure map to use or resell
Malake Karpasos, Athletikos Cloth, Exciting Tonic, Wind-up Philos from EW maps
Calf Leather, Cloth-softening Powder, Golden Beaver from ShB maps
Dress material, Mariner Cotton Cloth, from ARR maps
Farm in Bozja/Zadnor
Farm skirmishes and critical engagements for lockboxes which have things to sell
Farm fragments from enemies, Castrum, Delubrum and Dalriada to resell
Farm clusters from various enemies to purchase items and resell
Farm in Eureka
Farm Named Monsters to get lockboxes which have things to sell
Complete bunny FATEs to uncover hidden treasure chests and, if lucky, get high-valued mounts and minions
Farm in Palace of the Dead/Heaven on High
Get sacks to reveal rewards to sell
Open chests and, if lucky, get items to sell like
Participate in the Moogle Treasure Trove events when they're around
Earn Moogle Tomestones from doing various duties
Use Moogle Tomestones to get items to sell
Crafting
Craft things people need, like gear, raid food and tinctures
Check into the latest craftable gear people need to start raiding
Check into the latest tinctures people need for raiding
Items needed for crafting job quests
Craft things people want, like housing items, glams, mounts, minions
Pajamas, Rebel/Urban Coat, Dalmascan clothes, Spring Dress
Nana Bear, Plush Cushion, Stuffed Bear
Primal weapons made from high-end trial materials
Magicked Bed, Flying Chair
Craft collectables to earn Crafter Scrips to buy and resell items
Custom Deliveries, Crystarium Facets, Sharlayan Studium and Rowena turn-ins
Use Scripts to get materia, Oddly Specific items and materials to sell
Desynth items and unneeded gear and sell the resulting materials
Craft housing exteriors with company workshop to resell
Craft for Ishgard’s Firmament
Earn Skybuilders’ Scrips to buy and resell items
Participate in Firmament Fetes
Earn Fete Tokens to buy and resell items
Complete Crystarium levequest "A Cookie for Your Troubles" x 99 leves
Craft brand new items from the latest expansions and patches
Gathering
Gather higher value materials
Compare gathering log to mb and gather what sells the most
Gather materials needed for raid food, tinctures and current-tier crafted gear
Gather materials very commonly used
Dark Matter Clusters, elemental Crystals, Shards, and Clusters
Gather collectables to earn Gatherer Scrips to buy and resell items
Custom Deliveries, Crystarium Facets, Sharlayan Studium and Rowena turn-ins
Use Scripts to get materia and other materials to sell
Gather maps to resell on market
Kumbhiraskin Map, Zonureskin Map, Boarskin Map
Gather for Ishgard
Gather materials that sell well to crafters
Get Skybuilders’ Scrips, then buy and resell items
Participate in Firmament Fetes
Earn Fete Tokens to buy and resell items
Gather brand new items from the latest expansions and patches
General
Buy items from NPCs and resell for profit
Items used for weekly Fashion Report
Turn unneeded gear into GC seals, then buy and resell items
Glamour Prism, Glamour Dispeller, orchestrion rolls, Material Boxes
Use tomestones to buy and resell items
Orchestrions from poetics, materials from current tomestones
Set retainers on ventures
Get crafting materials to resell from specific ventures
Send them on quick ventures and get lucky with random items to resell
Dispatch retainers to city with lowest weekly tax rate
Unlock tribes and resell items
Sun Lemon, Night Milk, Undyed Velveteen
Special dyes only obtainable from tribes
Use FC workshop to craft housing exteriors to resell
Ask an officer for help starting and completing a company craft
Garden to create high-value items
Thavnarion Onion Seeds, Thavnarion Onions
Create a solo alt FC and use submarines
Fit subs with specific components per build guides
Send subs on specific routes to get high value jewelry items
Sell jewelry items to NPCs for 8k-34k per item
Sell materials, minions, orchestrion rolls and more from voyages
Use aetheryte tickets to reduce teleport fees
Craft things for yourself, or ask a friend/FC mate to help craft