1. Find an area with a lot of questions and not many answers. Create a content site. Attract 834,000 visitors per month. Advertising should net you $100K per year (this is an approximation and can vary a LOT).
2. Find a problem large enough for which a solution can be built with PHP and mySQL (since you mentioned that's your main skill set). Build a solution which costs around $25/month. You need only 334 customers to reach your goal.
How do you identify problems? Do some market research (using Google Trends, Amazon Top Sellers, niche forums, etc).
1. Find an area with a lot of questions and not many answers. Create a content site. Attract 834,000 visitors per month. Advertising should net you $100K per year (this is an approximation and can vary a LOT).
2. Find a problem large enough for which a solution can be built with PHP and mySQL (since you mentioned that's your main skill set). Build a solution which costs around $25/month. You need only 334 customers to reach your goal.
How do you identify problems? Do some market research (using Google Trends, Amazon Top Sellers, niche forums, etc).
Good luck.