1. Realising that 99% of the time, the stack doesn't matter. Users don't care about whether you're using a single PHP file or a dozen NodeJS microservices. 2.

1. Realising that 99% of the time, the stack doesn't matter. Users don't care about whether you're using a single PHP file or a dozen NodeJS microservices. 2. Realising that complexity is the enemy. Smart people avoid complexity, dumb people who think they're smart introduce complexity. 3. Realising that in order to ship anything worthwhile you need good specifications, a clear line in the sand, and the time to be left alone to do it. Edit: 4. Shipping something small is good. You don't know what is needed, but once you've ran something in production for a few days you probably will. YAGNI and MVP all the way!