Written communication starts and ends many parts of a startup's business. It's an email in which someone introduces you to future business partners, it's confirmation that funds have been deposited, or it's a teammate's resignation letter. Much of written communication is informal, but the big stuff is always written and it needs to be perfect.
Back in my former life as a consultant I had a spelling mistake in an email. I wrote "It is a please to meet you" instead of "It is a pleasure to meet you." I recall one of my bosses being extremely angry. She thought I made the whole firm look bad from that one mistake. I thought she was exaggerating--but she had some merit. People look at you a bit differently if you're sloppy with your written communication. So, take a few seconds and proofread your email before sending it. The few seconds it takes is well worth the time because it could lead to great things for your business.
--Liz Kammel is co-founder and CEO of ZipFit. She developed an algorithm that matches men to their ideal pair of jeans based on their size and specific fit preferences.