@Evan O'Brien- I'll try generalize some of the steps I take, however each person will have their own unique way of operating.
I take more of a top down approach. Starting with high level factors (i.e. demographics) and the go into the granular (condition of property).
1. General Market Research of City/ Area ( i.e. demographics, population trends, Crime, vacancy, expected rents per unit type, market values/trends, etc)- To ensure you are buying in a solid market
2. Ensure the immediate area around the property is viable (i.e. no serious crime, not in a bad location, etc. )
3. Ensure property type is appropriate for your market( ensure it's not too small, has bad layout, parking, etc.)
4. Inspect property for all necessary repairs and any potential deal breakers
5. Confirm rents, expenses, ARV of building based on inspection of building
6. Legal review (zoning, title, permits, etc)
Again this is not everything, but some general things to consider.
The two biggest mistakes I can think of that most beginning investors make are underestimating repair costs and overpaying for a property.
To prevent underestimating repair costs, team up with a good general contractor who can give you an estimate of what it will cost.
To prevent overpaying, really make sure you understand what your ARV is and try not to pay more the 80% of the ARV minus costs.