I grew up hearing my mother say, "My cell phone is for my convenience, not yours," and "If it's important, they can leave a message." Do not let constant connection tyrannize your attention. Do not let trivia distract you from important things. Let it ring. If you're doing something cool, they'll understand.
Also, your mental appetites are like your physical appetites: you crave what you eat. If you eat a lot of chocolate, you'll crave chocolate; soda and soda; tomatoes and tomatoes. The more you check your Facebook, the more you'll want to. Do it hourly and you'll follow every link, tag every photo, reply to every comment. Go without it for a couple days, and when you return your visit will be quick and non-compulsive, skimming the good stuff and going back to other things.
Also, your mental appetites are like your physical appetites: you crave what you eat. If you eat a lot of chocolate, you'll crave chocolate; soda and soda; tomatoes and tomatoes. The more you check your Facebook, the more you'll want to. Do it hourly and you'll follow every link, tag every photo, reply to every comment. Go without it for a couple days, and when you return your visit will be quick and non-compulsive, skimming the good stuff and going back to other things.