Some ideas for surprising a boyfriend include purchasing tickets to a ballgame or movie and preparing a candlelit dinner. Other ideas are to plan a dinner at a waterfront restaurant and throwing a barbecue with all of his friends.
Some simple surprises to add to daily life include taking his car and filling it with gas without letting him know, putting his favorite beer in the fridge, particularly before a big sports game, and ironing his shirt without complaining about it. Another option is to pick up his favorite dessert on the way home from work.
For some more risqué ideas, some surprises are to forget wearing underwear on purpose or to wear fishnet stockings. A boyfriend may also like it if his significant other dresses in lingerie and puts a bow on to indicate that she is a gift for him.
Other surprises include writing a romantic note, surprising him with a romantic getaway, doing something that he would never expect and baking him something. A particularly nice idea for a romantic getaway is to pick a place where there are few other people and interruptions, providing for relaxation and allowing for focus to be on the couple and the relationship.