If your budgie is relatively new, he/she may need some more time to settle in and become comfortable in his new surroundings. New budgies are often nervous about coming to a new home. Do what you can to help him/her adjust. If your budgie appears particularly nervous, try covering the cage partway to give him some security.
If you’ve had your budgie for a while and he just seems bored all the time, you should know that budgies are social flock birds. The flock is a very important part of a budgie’s life. Almost everything a budgie does is normally flock oriented. Preening, eating, napping, socializing are all done as a flock. It is important to make sure your pet budgie is part of a flock. If your budgie is lone and is not tame and does not have much interaction with anyone in the household, he will be missing a vital aspect of his life. In this case, it is best to provide your budgie with a flock-mate, another budgie, in an appropriately sized cage for two. If your budgie is tame or you plan on taming him, you must make him feel like your family is his flock. Your budgie needs daily time out of the cage, with plenty of interaction. Have your budgie on your shoulder to watch TV with you. Have him sit down for a meal and give him some healthy tid bits off your plate. Make sure you get some one-on-one time with him and talk to him like you guys are friends. You and your household can be a sufficient substitution for a budgie flock as long as you provide him the interaction and inclusiveness that a budgie flock would.