To an extent, the process i normally go through is:
1. Think about what I want to write at the moment
2. Think of a good, punchy title
3. Take the key parts of that title and run them through keyword checking
4. Tweak the title accordingly
I don't spend more than about 5-10 minutes on keyword research, but even that can be enough to ensure that you're targetting the best ones.
After all, if you're taking the time to create great content, it makes sense to give it the best chance of being found.