Thirty days is just about the right amount of time to add a new habit or subtract a habit - like watching the news - from your life.
Matt CuttsThe next 30 days are going to pass whether you like it or not, so why not think about something you have always wanted to try and give it a shot for the next 30 days?
Matt CuttsThe objective is not to "make your links appear natural"; the objective is that your links are natural.
Matt Cutts