I live in Canada, but I am not a citizen of Canada. In order to incorporate my business in Canada, at least 25% of the board should consist of Canadian citizens, regardless of the ownership. I have Canadian friends and co-workers who are willing to help me with this matter without getting involved in the business, but I am not sure what to offer as an incentive and what precautions I should be aware of.
Actually, the requirement is in respect of Canadjan 'resident' directors. You don't need to be a Canadian citizen to satisfy the requirement, only resident.
As for what to offer (if you're not a resident either), directors + officers insurance at a minimum. In addition, depending on the stage and size of the company, you can offer payment for attending meetings or options. It really depends on how involved you want them to be and how much they want for the service. There are also service providers that will supply a nominee board member for a price. I haven't looked at what those prices are recently but I'm sure they are quite reasonable.