le labo, ds & durga, and plenty of the other indie perfumers sell samples of their perfumes for like $3 a sample! luckyscent.com also has decants of like any scent you could want. buy a sample pack and try different scents out till you find one or two you really like. then think about what aspect of the scent you like, and buy other perfumes samples with similar notes. once you find one you really love, buy a bottle!
you may find that some scents work best during the night but feel overwhelming for work, or maybe they smell great in the summer but are a little too floral and fresh for winter… half the fun of perfumes :)