Here is my "secure and carry" method that I use every once in a while for isolated pin stitches. This is not an official method but it seems to work. Give it a try and adapt it as you like!
In summary, I complete the top leg first and then secure the bottom leg by stitching it as two sets of quarter stitches.
If there are many isolated stitches I just carry my threads between all of them (I dislike starting and finishing threads so frequently!) and then snip/trim all the carries at the end. Because all the threads' starts and tails are secure they don't need any additional weaving or tucking.
When using DMC I may even carry as far as an inch or two(!), but with overydyes and silks I wouldn't go over an inch because it would waste too much thread. And of course, trim them all at the end.