Save Money - 'Nuff Said
Network - Books and podcasts are great but they only go so far. Network with other investors, agents, lenders, contractors, management companies etc. in markets you are thinking about moving to. There is only so much you can do without getting in front of people. Get on Portal emails from agents to get a feel for deals in different markets.
Define Goals and Criteria - Probably the most important. If you don't know where you are trying to go every road will lead you there. ROI, cash flow per door, rehab you are willing to undertake etc. Know exactly what you are looking for so you will know when to pull the trigger.
Set a deadline and work backwards - I find this very helpful. Ask "what do I need to do by ___ Date to accomplish my previous goal."
1/1/18 close on a 4-plex
"What do I need to do by 10/1/17 to close on a 4-plex by 1/1/18?"
10/1/17 move to target market
"What do I need to do by 9/1/17 ...."
etc
and work backwards to what do I need to do this month, this week, today, right now. Do this once a week at a dedicated planning time and plan your week around your weekly goal while keeping an eye on your other goals. I like Sunday nights for this.
You are way more likely to accomplish your goals (even little ones) if you write them down, and even more likely if you tell someone else who will hold you accountable.
Good luck!