be more positive

I was getting on okay with this in tiny steps until we very recently found out dad has cancer and been told that there isn’t much/any hope. So, I think this goal has become both a lot harder and more important than ever.

A positive?

The discovery of dad’s cancer has made my mum and dad decide that they do love each other and they are getting married. They broke up 8 or so years ago, over the last few years they’ve become friends again and later dad moved back in with us when he became injured as he was told he shouldn’t live on his own. Mum said he could live with us, however it took along time for them to decide to get back together. Now they’re getting married next week.

I moan a lot. I don’t mean to but I do. I’ve had a few comments, often jokey, from my friends, boyfriend, and mum about me moaning too much but it hit me while talking to a friend that instead of commenting on the really lovely weekend I had I instead focused on how bad my week to come would be in comparison.
How can this be achieved?
To try and refrain from telling others about my negative rants, to focus on at least one good point of a (bad) situation if I start thinking about it, and to focus on the positives in my day and life.
I rethought of a complaint I had today: instead of thinking of how my train, delayed for an hour, would make me get in late instead I thought about how I used that extra hour to explore that bit of an unknown city and took some lovely photographs.
My life is really quite wonderful.