Some of the most common and appreciated ways of personalizing a birthday gift include imprinting a special picture on your birthday gift item, scribbling a cute birthday message on the birthday gift, or simply attaching a special quote or endearment that you use for the person. These are very basic and useful ideas that can be opted for by absolutely anybody.
However, if you wish to be more creative, a good idea is to write a special poem for the person -on a piece of cloth, and sign it with your thumb impression instead of signing away your name. Wrap your birthday gift with this to make your present stand out of the rest! Another great thing to do is get a scroll and write your birthday message on it. Create it in such a way that they can hang it on their walls for a long time.
If you are gifting a birthday gift like a movie or a music CD, you can slip an extra CD of your own self- singing a song or talking to them wishing them happy birthday. This works well if you share a long distance relationship with the person. If you are really close them, and are sure they would not mind- while gifting a birthday gift like iPods, pendrives etc, you can also put in your gift some great software, or music and movies of their choice.
If you are gifting a number of miscellaneous gifts in a gift basket, a very good birthday gift personalizing option would be to decorate the basket lavishly with creative ideas. Dress it in colored paper, or cover it with stylish satin cloth with prints or embroidery done by you. Use lots of ribbons, confetti, sparkle colors, etc on the basket and over your birthday gift (only if appropriate of course) to complete the personalized look.