Two things need to be done this time around. Engine timing belt change and whatever components related to it, and scheduled engine lube service which is already due.
Do It Yourself: Yes
Well…. here are some parts that I change for the first time since owning this car, March, 2009. Some of the issues has been detected earlier (more than a year ago at least) but I kept delaying it until it come to a point which I think it is a worthwhile to do it in one shot (YMMV). The first two DIY were done two weeks ago and the rest was today.