Use StackExchange? Got friends who do? Keep up with how they're doing - track their progress and yours!
Want to see how fast you're gaining reputation compared to your friends? Want to see when you finally beat their reputation? Add them and use StackCompare's historical reputation graphing.
Your friend has more badges than you? See exactly what you're missing with a detailed user comparison tool showing what badges they have that you don't, and vice versa.
Got something you'd like to see in StackCompare? Just get in touch and we'll see what we can do.