1) Pay off credit card debt.
2) Research on popular asset allocations (i.e. 3 fund, 60/40, permanent portfolio, etc.), figure out the pros/cons of each, and find one that best suits your financial situation. Use it as the basis of your asset allocation.
3) Invest passively in the asset allocation you picked in #2. Rebalance with periodic contributions (use cash the buy the asset class that's most underweight compared to its target.)