What other choices your target customers have to solve their pain point. Research and assess the strengths and weaknesses of each.
Research Distribution Channels
What is the best way to deliver product or service to target customers? This will impact your sales strategy and financials, as well as marketing mix.
Define Marketing Mix
Check about information defining marketing mix: Product, Price, Place and Promotion.
Analyze the Financials
Put marketing budget and evaluate projected marketing ROI, customer acquisition costs, etc.
Review and Revise
Continuously evaluate the effectiveness of marketing strategy, and revise or extend as needed.