I'm 25 and recently got offered a new job and start fairly soon. I've already looked at takehome pay calculators and can already feel myself thinking about all the things I could buy/upgrade about my life. A few things like slightly increased rent to live in a nicer place and a more expensive gym are just going to happen because they genuinely matter to me but lots of other "nice" things have caught my eye which has been slightly concerning.

I guess I was just wondering if people had any speicifc traps that they've fallen into before when having more to spend? I just don't wanna screw this up now I have a good opportunity to save a solid amount - for context I'm moving from 36K to 65K (in London) which is ~1.3K more pcm in take home.