Do the shopping at Tescos, spend >£50 and you get a voucher for 5p off a litre. Did this last week and had £3.50 deducted from my diesel bill

Vans are not racing cars, so drive accordingly, smooth and in appropriate gears with a light throttle. Obey speed limits. Quick get aways gobble fuel like a thirsty Richie in a vat of Creme de Menthe

Be aware of your fuel in tank at all times and plan your fill up stops to coincide when you are passing near to your preferred supplier.
It's a fact of modern living that fuel is, and will continue to be, expensive. Can't do nothing about it so why worry? Just charge realistic prices that will cover ALL business expenses.
A tank full lasts me 5 weeks, 4 weeks if I'm unlucky

Safe and happy driving

The Ken