Hi Sarah,
Chocolate is always a winner. And a nice bottle of wine, fruit, cheese, crackers.
If you are thinking of a theme and want something different. . .
Book theme: Book, decorative bookmark, book light, snacks
Beach Gift Basket:Roll-up beach mat, beach towel, sunscreen, sun hat, tote bag, Frisbee, inflatable beach ball, flip flops
Gardener: Decorative plant markers, packets of seeds, gardening gloves, garden tools, wind chimes. Terra cotta pot makes nice gift container.
Spa Gift Basket: Rolled up towels, aromatherapy candles, bath salts, body lotions, shampoos, soaps, inflatable bath pillow, loofah sponge, bath mitt, massage oil
Picnic for Two: Wicker Basket with lid, tablecloth, and dinnerware for two, wine glasses bottle of wine, cheese and crackers.
Barbeque theme: Utensils, apron, platter, potholder, cookbook, barbecue sauce, spice rubs
Coffee theme: Specialty coffees and creamers, mug, coffee bean grinder, gourmet cookies
Golf Theme: golf balls, tees, sunglasses, visor, insulated drink holder, beer or sports drink, golf towel. Container may be cooler.
Chocolate gift basket: Truffles, assorted chocolate covered anything, hot chocolate, chocolate stir sticks or spoons, goes nice with gourmet coffee
Hope this helps.