Plan around the rail network
A weekend Anytime Return is often £10-20 to neighbouring cities. Saturday-Sunday railcard discounts add up if you do this regularly. National Rail's 'cheapest fare finder' is genuinely good at flagging splits and off-peak windows.
Local walking and cycling routes
Most UK cities have a 'Wheelers' or 'Strollers' Sunday morning group that's a great way to see somewhere new with locals. Strava heatmap shows you where everyone runs/cycles — usually the prettiest routes.
The two-hour rule
Aim for somewhere within 2 hours by train. Beyond that, you've spent half the weekend in transit. The right call most weekends is: somewhere new on Saturday, recovery and food prep on Sunday.