Action.
That's it, nothing else will ever work. Ever.
Changes take time, but time is an illusion, there's is only right now and the only thing you can do right now is act. This isn't some "being present" thing from Tolle, but a fact of reality.
You spend much of your time daydreaming about an UNREAL future, or wallowing in an UNREAL past, both which don't exist. I'm not saying that the future and past serve no point, they help us focus on a brighter future, and learn things from the past, but if we aren't taking action then we didn't learn anything really, and we definately aren't creating that brighter future.
You say changes take time, but they really don't. Growth takes time, changes happen in a moment. One second it's one way, the next second it's another, that is change. It doesn't have to be big either, all change, no matter how small is change.
Your solution would be to take action, every chance you get. It doesn't matter if you are "inspired" or not, just do something. If you are daydreaming about a brighter future, do something to change your life towards that future, anything at all, as long as it improves your life. If you are feeling sad, do something to stop feeling so sad, remove something negative from your life. If you are feeling happy, do something with that happiness, increase it and bring more of the same into your life. If you are feeling neutral, then do something to make you happy, or remove sadness, your choice.
The only thing left is to act. It may "take time" as in the years will pass, but they'll do that anyways. The only way to arrive in the future better than you are now, is to do something about it. Everything else is just guff.