Generous vacation time. Really.
If you get six or seven weeks of paid vacation a year, switching jobs even for another 10-20% pay is a very hard sell. And frankly, it isn't like vacation time really negatively affects productivity; most developers don't sit down and code for 8 hours a day; they code as ideas flow, and usually ideas kind of "queue up" on when one takes a break anyway.
Generous vacation time. Really.
If you get six or seven weeks of paid vacation a year, switching jobs even for another 10-20% pay is a very hard sell. And frankly, it isn't like vacation time really negatively affects productivity; most developers don't sit down and code for 8 hours a day; they code as ideas flow, and usually ideas kind of "queue up" on when one takes a break anyway.