Instead of stuffing your blog articles and brochures with fluff, try to quantify the value for each claim.
Examples:
Best customer service: Give examples of how you always reach a live person who has been given the authority to handle whatever issue there is, or how you will never be put on hold for more than x amount of minutes, or an award you received in recognition of customer service. Do a survey or Net Promoter Score to give your customer service an actual number.
Industry-leading: Show numbers from independent sources that confirm your product is in fact leading the industry. Do a competitor comparison. The point is to back up the claim, which unfortunately, is something most companies forget to do.
Does your product save the customer money? If it does, tell them how much it will save them.
Is your product better for the environment? If it is, talk about comparative emissions numbers, or how many trees don’t have to be cut down.