There are lots of ways to optimize. Generally speaking it’s all about reducing complexity.
1. Are there any processes that could function outside of your main base(s)? For example, reporting processes and associated fields might be able to live on their own in a synced base, lightening the load on your working environment.
2. Rework/simplify/remove “expensive” fields - linked records, lookups, rollups, and formulas are going to cause the most strain on performance. Unfortunately they’re also what makes airtable so great, lol. Try to find areas you can streamline.
3. If you’re using the function NOW() anywhere, try to replace it with TODAY(). NOW() is known to bog down performance.
I could go on, but I’d say those are my three biggest tips. 🙌