Once you have the received the funds from your crowdfunding campaign, make sure you first send the receipts to all the funders.
Then, please go full steam ahead, and start executing your project. Make sure you keep hitting the milestones as per the committed timelines during your crowdfunding campaign.On Fueladream, at each milestone, make sure that you update the backers/ donors of having reached there - they'll be really happy to know, and will keep following you with interest.
Engaging with your funders after your crowdfunding campaign ends allows them to know where their contribution went, how it's being used. This will be a great community for you to foster, when you come back to raise funds the next time!