Obviously I have not tried too hard this year yet, but I only go there when I have time, which is usually a few times a week for about a 1/2 hour or so.
Now, when you login, you will see something like this:
Click on instaGC and you will presented with a drop down menu on the left side of your screen, click Daily and everything on this page can be done daily, if you qualify.
Click on any of the other names and look for different things to do, most are free, some do require you take a free trial that requires a credit card. For those, I highly suggest you read their terms of service and know how and when you will be charged. Whatever you do, do not cancel right away or you will lose your instaGC dollars. You will need to wait till the end of the trial, if you do want to cancel. It is recommended that you only sign up for offers you are truly interested in and never use fake information. In most cases it is best that you sign up for a junk email or several of them and use them for the offers, but some offers will require you to use your main email, so just watch what is required and I hope you Earn Free Instant Amazon Gift Certificates while having fun making money at instaGC :)