tbh not much in terms of self talk, while im riding, im usually thinking how much im enjoying it, or the faster I go, the smoother the rest of my day will go, since I'll be home earlier, beat my girlfriend into the bathroom for a shower and be eating breakfast earlier.
When I run though, I just think about my friend who I run with at weekends, and about how if he is going to beat me over 5km, im going to make him hurt really bad for it!