The most important thing (well, aside from positioning yourself behind a party member) is to set it up in a macro so you can reliably chain it with a physical weapon skill (or just be able to use it more often). As a previous commenter stated, chain it with Sneak Attack as well until level 60.

The most basic macro you should have should look something like this:

  • /recast "Trick Attack"
  • /ja "Trick Attack" <me>
However you might want to add a line or two stacking some gear for it if you don't already have another macro swapping gear for your weapon skill (or if you are using a magic based weapon skill instead).

For Trick Attack, you'll want to stack AGI gear, and if you are combining it with Sneak Attack, you'll also want to stack DEX.

At 37 you might not have a lot of gear for boosting these unless you work at it, which might be something you may wish to skip if you're leveling at a pretty speedy pace.

But if you're willing to take time away from leveling, you can dump some time/money into getting a few pieces. This isn't a complete list of gear, as it omits some gear such as the Rajas Ring, or Race Specific Equipment, as well as only listing some AGI gear rather when what is necessarily best for your job in any situation. Additionally, it only lists gear from 1-40, which means even leveling a small amount may outdate some of this gear fairly quickly.
  • Ranged:
    Power Crossbow - AGI+1
    Long Boomerang - AGI+2
  • Head:
    Emperor Hairpin/Empress Hairpin - DEX+3 AGI+3 EVA+10
  • Neck:
    Rabbit Charm - DEX+1 AGI+1 Steal+1
    Agile Gorget - AGI+2 EVA+1
  • Ears:
    Genin Earring - AGI+4 (Latent /NIN)
    Drone Earring - AGI+3
  • Body:
    Mercenary Captain's Doublet - DEX+1 AGI+1
  • Hands:
    Mage's Cuffs - AGI+2
  • Rings:
    Alacrity Ring/+1 - AGI+3
  • Back:
    Nomad's Mantle +1 - AGI+2 EVA+3
  • Feet:
    Leaping Boots/Bounding Boots - DEX+3 AGI+3

Personally, aside from the Leaping/Bounding Boots and the Emperor/Empress Hairpin, I'd avoid dumping a lot of time or money into these as they tend to get outdated if you level quickly, and it is usually better to dump effort into your weapon first.

If you're interested in finding more gear like this, or just pricing it, check out FFXIAH's advanced search function. I think you'll find it helpful.