To avoid feeling miserable about your Life, stop making assumptions about it. It is almost often the fear of how your Life will end up that cripples you and brings you suffering.
Think about it. We have been created to be able, yet we often become miserable. We fret and fume over our situations, our environments, our relationships, our jobs, our governments and so many, many other things! One of the reasons why we invite misery upon ourselves is we imagine a lot of scenarios that don’t exist. What we assume to be a worst case scenario never really happens. Yet we constantly fear it will and that fear debilitates us.
The other reason we are miserable is that we are all attached, particularly, with anything to do with money. Money is important, no doubt. It is fine as far as you are in possession of money. But if money has started possessing you, well, you certainly have a problem. The greatest wealth you can have is this Life. Intelligent living is the ability to employ discretion and to use money, to the extent one needs it, than be consumed by trying to protect it. Again, the truth is that everything that you__and I__need is provided for. Our needs never bring us agony. Our wants do. So, simply being happy, despite your circumstances, can make your misery vanish.
That is not to say that you will not face problems. You will. Such is the nature of Life. But when you understand that imagining something that has not happened yet, fearing it all the time, is what causes you misery, and you realize that money is impermanent, your ability to deal with the problems you are faced with improves substantially!
So, be present when Life is happening to you. Don’t cling on to anything. Don’t imagine stuff that hasn’t happened yet! Your misery will make way for peace and bliss!