I admit, some are simple . . . some are a pain in the gluteus maximus. Me personally, if I feel like doing them; I do . . if not, I don't. I'm not a perfectionist and I don't care about getting platinum.
2. DO a trial run! You want to know the exact path to those runestones, you don't have time to second guess yourself. DON'T use your crystal on the trial run, just find the runestones and memorize any QTE's and Grapple's in between.
3. Pressing X and a direction while travling big horizontal distances. Save some time.
4. Always use the Crystal before starting to climb the titan. You know, before the timer has started.
Those are all general pointers that will help anyone out.
Magus: I won't... be beaten! I survived the darkness to defeat you, Lavos!