Below is a list of places to seek opportunities by category. Certainly we have not identified all the markets that could be added to this list.

1. Sports
Seek out teams as well as individuals,participants as well as spectators, professional as well as amateur. (This is a sample list, it is not meant to be all-inclusive.)
A. GolfJ. SoccerS. Ice Skating
B. TennisK. SkiingT. Hockey
C. FencingL. BoatingU. Roller Skating
D. Sky Diving / FlyingM. PoloV. Darts
E. BowlingN. HuntingW. Cheerleading
F. Baseball / SoftballO. Hot Air BallooningX. Surfing
G. FootballP. FishingY. Boxing / Wrestling
H. VolleyballQ. Karate / JudoZ. Scuba Diving
I. BasketballR. Racquetball 
2. Tourism
Analyze your surroundings to see what tourists attractions exist.
A. Ski ResortsE. Dude RanchesI. Museums and Historical Sites
B. BeachesF. Local, State, and National AttractionsJ. Amusement Parks
C. MarinasG. Gift ShopsK. Airports, Train Stations, Bus Depots
D. Summer CampsH. Visitor Centers 
3. Manufactures
Emphasize the benefits of advertising through corporate or product logos being worn, as well as employee identification and pride in their company. Pick any category and identify as many as you can.
Large Equipment
A. CaterpillarD. PeterbuiltG. Mack Truck
B. Jon DeereE. KenworthH. GMC
C. CraneF. Ford 
Food & Beverage
A. General MillsE. CoorsI. Kraft
B. General FoodsF. Coca-ColaJ. Proctor & Gamble
C. Best ProductsG. HeinzK. Coke
D. Anheuser-BuschH. Del MonteL. Pepsi
4. Service  
A. Restaurants / BarsG. Day Care FacilitiesM. Beauty Shops
B. Hotels / MotelsH. Upholstery ShopsN. Heating / Plumbing
C. Gas StationsI. Moving CompaniesO. Carpet Cleaners
D. Appliance Repair ShopsJ. RealtorsP. Caterers
E. Doctors / Dentists OfficesK. Insurance CompaniesQ. Janitorial Services
F. Clinics / HospitalsL. Lawn Care Companies 
5. Entertainment
A. NightclubsE. CasinosI. Opera Companies
B. Comedy ClubsF. Dinner TheatersJ. Race Tracks
C. Movie TheatersG. Broadway Musical Sponsors 
D. Musicians / Bands / OrchestrasH. Record / Video Stores 
D. Musical  
6. Hobbies/Clubs/Organizations
A. Crafts (sewing, knitting, model trains, planes)G. GardeningM. Scouts
B. Amateur RadioH. MotorcyclesN. Masonic Groups
C. Cards, GamesI. 4-Wheel DriveO. Service Groups
D. MusicalJ. PhotographyP. Professional Groups
E. Autos (From Rolls-Royce Clubs to antique cars)K. Gourmet CookingQ. Country Clubs
F. Animals (owners/breeders, animal shows)L. Military Organizations 
7. Churches / Charity Organizations
8. Political Campaigns
9. Mail-Order Catalogs
10. Other Embroiderers:
Offer to handle overflow work. Line up a multi-head shop for their overflow work.
11. Wholesale Markets
A. Ad specialty firmsG. Bath / Linen ShopsM. Art Galleries
B. Screen Printers / T-shirt shopsH. Craft ShopsN. Interior Decorators
C. Sporting Goods and Apparel ShopsI. Department StoresO. Trophy Shops
D. Children / Infant ShopsJ. Men's StoresP. Pet Shops
E. FurriersK. Women's Apparel StoresQ. Christmas / Novelty Shops
F. Dry CleanersL. Uniform Companies