Think about every good thing in your life right now. Free yourself of worrying. Let go of the anxiety, breathe. Stay positive, all is well.
Do not force your mind to get rid of random thoughts, because your brain is simply not capable of doing so. Instead, when you sit to practise meditation, let the thoughts come and go, just don’t serve them tea. Over time, that background noise inside your head would disappear.
The fact is, inner peace isn't something that comes when you finally paint the whole house a nice shade of cream and start drinking herbal tea. Inner peace is something that is shaped by the wisdom that 'this too shall pass' and is fired in the kiln of self-knowledge...