Aside from self-discipline, one way to limit your use is to not have the Facebook app on your phone. Only access it via a computer so that you aren't tempted to get sucked into the black hole that is facebook when you are able to check it anywhere via your phone. I personally hate when I go out somewhere and see a group of people where all they are doing is scrolling through their phone. Anyways, that's neither here nor there...
The other thing to consider is who did you re-start it up for? Yourself? Others? If you did it at the urging of others and it was because they wanted to keep up with you, ask yourself if those people really need to know everything that is going on in your life (you know, as is the nature of Facebook nowadays). If it is a small group of people who you want to be able to keep up, then you can always go old school----a phone call to an aunt; text or email a couple pictures to grandma; you get the gist. Personally, get rid of the facebook if you really don't like it.
The way I see it, I only personally have a small circle of friends and family who I feel even need to be kept in the loop about my life. It sounds kind of harsh, but if I am not close with someone, then they don't need to be able to keep up with what I'm doing. And if someone truly wants to know, they can text or call me.
