Hi Sam, I'm a young entrepreneur who is really passionate about startup and SAAS. For one man SAAS B2B startup with limited funds is there any advice on initial

Hi Sam, I'm a young entrepreneur who is really passionate about startup and SAAS. For one man SAAS B2B startup with limited funds is there any advice on initial growth? I have used Twitter with some success and used Adwords but had little success (could be due to not enough budget)