Some background knowledge about perfumes. A perfume has 3 levels of smell, made possible by the uniquely blended perfume oils . So be really perceptive when trying out perfumes. Floral scents are associated with romance while spicier and greener scents makes one seem sporty. If you'd like to come across as sophisticated and unfathomable, go for the woody and musky scents.
Some people like to spray their perfumes onto the shirt.
Now, that is perfectly alright. If you want to personalize your scent, apply the perfume to where you think you smell most or to the oiliest part of your body. Thick, musky scents are the best for this because they tend to 'react' with your body's natural oils. The light, citric types are more inert and smell the same from day to night. Also take note that if you've got an eau de parfum, you can apply less of it than an EDT, and for parfums, you need even much less.