Let's keep it simple and straightforward, share 1 tip that can help others in your dev team become more efficient!
I'll start with a classic trick to get cleaner code: The Boy Scout Rule. Leave your code better than you found it. Boy Scouts have a rule regarding camping, that they should leave the campground cleaner than they found it. The same applies for maintaining your codebase in the longterm.
Let me hear your best tip!
Drop your problem in the dev team channel instead of personal chat. The concerned person might not be available but you might get help from someone else who is free (much earlier).
Before you jump into coding, every dev team should map the nature of the problem and all the logical paths for creating the solution. This will give them clarity on how to build something and will keep everyone on the same page.
Identify the right areas to automate. Automation can facilitate in providing a good customer experience, create tight feedback loops or save costs. Examples:
Mark
Invest in decreasing waiting/wasted times for development, not just production performance.
I.e. compile times, server startups, vcs checkouts, running tests, databases...
It costs quite some time just by itself, but it also breaks one's focus, costing even more productivity.