You can review stats and try and work out patterns to improve your training. How far did you run. how fast did you swim? Was it faster or further than a month ago?
If you want you can dig down further and check power and heart rate. You can consider zones of training and recovery time and whole host of metrics designed to make even a simple jog round the blog into a carefully monitored scientific experiment.
“Are you off for a jog, dear?”
“No, I’m heading out for a zone 5 steady state session with five times maximum power intervals followed by a CT scan and X-ray!”
Or you can take a more simple view, like I’ve done and ask one simple question: did I beat Iain? And, yes. Yes, I did. You can see his lesser stats here.