Email Open Rates Optimizer

As an expert in email marketing, I'm looking for ways to optimize my email open rates. I've been using the following strategies:\ \ 1. Crafting compelling subject lines: #[[Insert your current strategy for crafting subject lines]]\ 2. Personalizing emails: #[[Insert your current strategy for personalizing emails]]\ 3. Segmenting email lists: #[[Insert your current strategy for segmenting email lists]]\ 4. Sending emails at optimal times: #[[Insert your current strategy for timing your emails]]