Just a couple of quick tips to tide people over as I work on a full post (next topic: helmets)
First, when you get new tires put on the bike, the handling changes. I put some Pirelli MT75s on the Ninja yesterday to replace the stock Dunlop K630s, which you may recall were getting pretty worn. Not only are the new tires rounded, the new rear tire is slightly smaller than the original. The combination of these factors lead to a faster turn-in than I was used. Add to that the fact that the Pirellis have better grip than the Dunlops and you get me grinning in my helmet all the way home from the shop.
Second, a little something I discovered on my way to get the tires replaced. I had not warmed up my engine enough to turn off the choke, but I did it anyway. Meaning that I stalled coasting to a red light. No problem, I thought, I'll just put the bike in first and pop the clutch to pop-start it. Bad idea. I should have remembered to put the bike in second gear to pop-start. Instead I locked the rear wheel and slid the back end out momentarily before I engaged the clutch and allowed it to turn freely again. Slightly embarrassed, I just turned the choke back on and hit the starter button.