Try to be happy in this present moment, and put not off being so to a time to come,—as though that time should be of another make from this which has already come and is ours.
If you realized how powerful your thoughts are, you would never think a negative thought. Learn to get in touch with the silence within yourself and know that everything in life has a purpose.
Before you start some work, always ask yourself three questions -
Why am I doing it,
What the results might be and
Will I be successful.
Only when you think deeply and find satisfactory answers to these questions, go ahead