What do you recommend as the most secure way to store my seed phrase? Are there any tips or best practices I should know about to ensure it stays safe and doesn't get lost or stolen?
Split you SEED into m parts by using one of n-of-m SSSS scenarios, say 2 of 3 minimum, 3 of 4 better security but more money to spend, and so on.
Put each part separately into tamper-evident bag.
Choose m private safekeeping companies which are not overlapping with each other and located preferably in different geographical areas.
Place your m tamper-evident bags into m secure boxes provided by those companies. Each single box must hold one tamper-evident bag.
SEED security by your money.