Plan your trips properly Often buying returns will be cheaper, however be careful as often these are valid for same day travel only. Also search for free bus services, some cities like Manchester, Leeds & Bradford have them.
Keep an eye on promotions / discounts / sales / apps Sites like Megabus have massive sales every year for instance
Get off one stop early and walk You might also find that two stops might be in two different zones, so getting off earlier could be significantly cheaper
Never buy a one-day travelcard (unless you do the maths & we’re wrong that day/month) In London, grab an Oyster card or use contactless payments instead, most of the time these will be cheaper. If you’re unsure then ask.
Grab a bus pass An obvious way of saving, these will depend on your local bus company but expect young person, student cards, family cards etc Lots of people share bus passes but obviously this is naughty
Buy a season ticket Another obvious way of saving that you’ve probably already thought about doing but we need to mention it