Remember that the little things which bother you now are exactly that: little. Even if your problems are weighing you down, even if cumulatively they seem impossible to face, even if you are completely overwhelmed and your mind is wreaking havoc on itself, you will not always feel this way. This is temporary. Remember that.
Take a few seconds to breathe, re-evaluate your situation (maybe your attitude about the situation as well), and just look up. Be reminded of who is on your side. Consider how powerful and flat-out inspiring the one who created you is; and you get to talk to Him personally. You get to be honest with Him. You get to ask him questions; ask Him for the things you want and need directly.
The same creator of all your favorite flowers in your garden, every ocean and every creature within them, the tall trees which have withstood years upon years of storms; He created it all for you. For us. He created you for a purpose. And that purpose is one much bigger than any problem in front of you right now because your purpose has the potential to create better longer-lasting effects than your problems ever will, if you so let it.
Let go if you must. Embrace challenges. Let them be reminders that you’re on your way to something better, that maybe this is for a reason bigger than you can see right now, that things will definitely feel better again.