Getting better all the time. I set a goal for myself, which I've already exceeded, but am still plugging away.
Finding small leaks and inefficiences that aren't much of anything on their own, but apparently have been adding up to a lot. Most recent example is the routine that, while you're reading a message, updates the count used to determine how many unread messages there are by a person on your Favorites page. I was calling that routine regardless of whether a person was logged in, which wasn't resulting in an error, but was resulting in wasted computing power. In the 10-second range I observed, it looks like it was getting called about 70% of the time by non-logins. Now it's only called if you're logged in.