I am the founder of a new project and we are just getting ready to launch our token.  We have spent a great deal of time thinking about this exact issue.  First off, all of our team members and most of our strategic partners are restricted from selling their tokens for the first 90 days after an exchange listing at which point the tokens will begin to vest at a rate of 1/8 of each team member's and most strategic partner's holdings per quarter over 24 months.  Tokens purchased during our private sale and pre-sales are also subject to a lock-up/vesting schedule which prevents the possibility of a major dump on any given date.  We have also developed several incentive schemes to reward loyal token holders including an airdrop for those tokens holders who hold their tokens 6 and 12 months respectively.