(1) Are you meeting your daily/weekly set objectives/goals?
If you want a productive job search then you should be setting yourself daily, weekly and even monthly goals to achieve. By setting these goals you are not only giving yourself something to work too but also helps you to be more organised in your job search e.g. apply for 7 jobs this month. Not meeting your goals means something is wrong that needs to be addressed fast!
(2) Are phone calls/emails getting returned?
Are recruiters calling you back? Are your emails being replied too? Set yourself time limits of when you should have heard back from jobs, recruiters/employers etc. If you not getting any feedback of any kind you know something is not working.
(3) What is happening with your networking activity?
If you are heavily using networking in your job search efforts, then you must track you efforts to help you know if what you doing working. How many new people have you spoke to? Which form of networking is proving more useful? Which platform (Twitter, Facebook, LinkedIn) you having more success on? If you have little or no activity then you need to address this issue.
(4) Are people wanting to interact with you?
Do others want to connect with you? How many new contacts have you made? How have they connected with you? Making connections with individuals or groups who could help your efforts is important. If people are not wanting to connect, what could you do to improve this?
(5) Are you getting any interviews?
Of course the overall indicator of whether your job search efforts are proving successful is if you are getting interview call backs. How many interviews have you had this month? When was the last time you had an interview? Of course if you getting none or just a few occasionally then look over your efforts. What could be done to increase the amount of interview call backs?