Meet someone new in your career this week. Wherever you are, go make it a point to either meet a new person, or learn a new thing about someone that you work with, near, or is in the same field.
I'll be at the PASS Summit this week in Seattle, and one of the things that I make it a point to do when I try to meet new people there. It's easier for me since so many people want to meet me and will come up and say hi, but I do try to stop and say hi when I'm in an elevator or on one of the long escalators in the Washington State Convention Center. Or in line, or at lunch.
Just say "hi, I'm Steve" and ask when they do, or why there came to the event. Or at work, ask someone what they did this weekend, or what they'll do next weekend.
Build or maintain your network this week. It doesn't have to be a daily or weekly thing, but make it a point every month to touch part of your network or grow it.