Only ever borrow the minimum you can get away with unless it's to make money. Even then it's often a risk. Fix the interest rates on debts where you are able. Make sure you can keep a roof over your head and pay your bills, everything else is a bonus, you are not owed a "standard of living". Basic stuff but so often I see people who don't follow this.
I moved, borrowed the least I could, fixed the rate for 10 years at which point the mortgage is paid off. The rates were at 300 year lows, they could only drop a couple of percentage points but had the potential to go much higher. Play the odds if you can. The bank would have lent us another £100k+ easily but I'd rather be debt free. Economies and interest rates ebb and flow, always have, timing is everything, and a little dose of luck