So many times, people will commit to something for let's say, 30 days, and they give up long before the end date. Choose a sooner goal. 1 week, maybe? Then, proceed to two weeks, three weeks, etc. If you believe that you won't be able to come up with new things everyday, keep yourself open to what is happening around you, who is in your life, events to look forward to, current experiences - - all positive thoughts. Rethink and retain those thoughts.
Make certain that you have 7-8 hrs./sleep/night. If you don't receive at least those hours of necessary sleep, you will be tired and your brain will be on high alert. You will have great difficulty seeing the positive aspect that life has to offer. And, on top of that, it's just not good for your health and well-being.
Get plenty of sleep. Expect positive outcomes and take note (literally & figuratively) of everything for which to be grateful and have (inner) gratitude.