It depends on what you mean by comfortable. Here are a few ideas:
1. Live below your means.
2. Save as much as you can.
3. Cut back on luxury items.
4. Don't spend on things you can't afford just to impress others.
5. If you have debt, pay it off as soon as possible.
6. Educate yourself about investments.
7. Don't just hand over your money to others to invest. No one can care about your money more than you.