All you need in this life is ignorance and confidence; then success is sure. You can "already know for sure" things that could actually impede progress. Always be on the lookout for the things you did not know, that you did not know. Secondly, work on strengthening personal belief that a particular will be achieved regardless of any adversity that may show up, or evidence to the contrary.
In all trouble you should seek God. You should not set Him over against your troubles, but within them. God can only relieve your troubles if you in your anxiety cling to Him. Trouble should not really be thought of as this thing or that in particular, for our whole life on earth involves trouble; and through the troubles of our earthly pilgrimage we find God.
You could cry, get worried or angry like any other normal human being, as long as you remembered that, up above, your spirit was laughing out loud at all those thorny situations.
Sometimes in life, things happen that will knock you back. Hell, you may get beaten to your knees but you must never ALLOW this world to knock you down! Conjure up all the strength you have and drive through whatever it is keeping you on your knees. Build up the strength and your knees may never buckle again!
A wretched soul, bruised with adversity, We bid be quiet when we hear it cry; But were we burdened with light weight of pain, As much or more we should ourselves complain.