USE THE SELF TIMER FUNCTION
Most cameras these days have a self timer option. We often set ours for 10 seconds and then run into the frame (with our camera set up on our tripod). You can also ask a stranger or friend to press the button if the shot is being taken from further away (if they seem trustworthy).
USE A WIRELESS REMOTE CONTROL
We often take photos from quite far away and quickly realized how exhausting it is running from the camera and back with a 10 second timer! A wireless remote control shutter release like this oneis the perfect solution (make sure you buy one that works with your camera brand and model). These allow you to click the remote when you are in position for a photo, rather than running back and forth.