It would be easier if i knew more about your brand, product, service.

Reasons for someone to follow you: - Quality content

• Costumer service
• Competitions
• Competetor
• You follow them
• Like you product, service

If you have traffic to your homapage:

• Promote your twitter account
• Include the twitter follow button
• Give your visitors good reason to follow you

And I guess, just take it from there