I’m going to talk about myself here, so just feel free to discard anything that doesn’t apply to you.
I’ve suffered from a form of bipolar depression called hypomania, where like manic depression you have a continual cycle of highs and lows, save that the highs are not very high. A cycle lasted anywhere from 3-4 days, with 2-3 days of very deep depression and half a day or so of buoyancy and high energy. The rest of the time I felt “normal”.
There is certainly a physical aspect of my depression: sometimes I can feel my body just shutting down, and soon after the dark thoughts follow. That being said, the majority of my depression is mental attitude. Quite often I’d start into my depressive mental monologue whenever I felt tired, not just when my body cycled to its nadir.
Fighting this depression has, for me, entailed a radical change of worldview. The primary reason for my depressive attitude–not my physical fluctuation–comes from an unwillingness to accept anything less than I what I feel is “my due”. Whenever things didn’t work out the way I wanted, or any time I failed, or any time I felt that finding anything positive in the future was extremely difficult or impossible, I became depressed, thinking in terms of suicide, futility, etc.
My biggest problem was that my depression was an excuse, specifically an excuse not to move on, and a means to wallow in self-pity. For example, I have a felony conviction on my record, and it makes it very difficult for me to find employment. I use my depression in this instance to rail at the world that I won’t get my dream $80,000/year job, and in that railing I refuse to “lower” myself to the jobs that are less than ideal. Moreover, I can use this excuse to not even try for a close-to-ideal job that may yet hire me. I use my depression to talk myself out of even trying.
For me, this isn’t a matter of life being terribly difficult. It is a matter of being to scared to face rejection, to try and fail.
My relation with God suffered dramatically during my depression, not because I doubted His existence or even His love, but because I wielded my depression as a means of justifying self-indulgence and not expending myself. You see, I had to distance myself from God to appease my conscience when I used immoral means to find comfort.
What has aided me in my fight against depression is the knowledge that I had accepted the belief that any time I feel slightly uncomfortable, I am justified in trying to relieve that discomfort. Life is full of discomfort, full of hardship and outright suffering. Yet when I was depressed, I wasn’t really facing hardship or suffering–I was only mildly uncomfortable. I turned to sinful activity because I could not bear to be uncomfortable for any amount of time. Notice the cycle: discomfort, then dark thoughts about futility of life and various “God doesn’t care” arguments, and then sinful activity. The middle step is just a unconscious (or even conscious) attempt to keep the conscience from interfering with that oh-so-pleasurable sinful activity.
What has been suggest to me to handle this problem is the following: anytime I am feeling uncomfortable and feel I just have to turn to sinful activity for relief, I put that desire on hold. I deliberately take an hour and do something to distract myself. For example, I will play a video game that requires my full attention, or I will read a book, or something. I do not, for example, go for a walk. Walking a long distance will tire me out, true, but it doesn’t take my mind off the discomfort. The problem for me is, as long as I’m dwelling on the discomfort, that discomfort is going to be clamoring for attention, and as long as it is clamoring for attention, I’m one hair’s-breadth away from giving in to temptation.
Now, don’t get me wrong. I keep God ever-present in this method. But what isn’t helpful for me is to make a long prayer in which I recriminate myself and endlessly beg for mercy and forgiveness. It doesn’t help to dwell on that issue. If I pray, I pray about something else entirely. Saying the Rosary is a good prayer, for then I’m meditating on the mysteries, not on my sinful behavior.
After the hour is over, then I can let my mind return to the problem. Often enough, it is still there. But the clamoring isn’t anywhere near as loud, and the temptation isn’t anywhere as fierce. Sometimes I even forget to return to the discomfort and the temptation, and that works even better.
I’ve that a good habit of reading the Bible, the Catechism, and apologetic works is wonderful for that hour when I’m trying to put off temptation. Praying regularly is very beneficial. Confession is crucial, for it places the soul right again and provides a decent impetus to avoid sin again. And of course, the Holy Eucharist. One thing that has always helped me is thinking, “If I cave to sin now, I won’t be able to receive the body and blood of Jesus.”
Lastly, with great humility, I’ve forced myself to say meaningfully, “Let not my will, but Yours be done.” That is one of the hardest things to do, because I want so much for my life to work in a particular way, and I know that it might not, or even can’t in certain places.
As I said, I’m talking all about me here, and thus there may not be anything you can use. But I hope this helps.