Two basic methods ...
1) Scatter to the four winds, then setup at the break point, wait at least 30 minutws, and call back using kee..kee..runs or hen assembly calls. Note that you must scatter them in all directions and not just flush the birds in one direction. Hard to do with one man. Easier if you have 2 or more screaming "bushes" coming from different directions.
2) Pattern and Ambush. The birds follow certain set routines each day if nothing changes it, and you can setup in places they habitate or along paths that they use for a successful ambush.
***Note: You can try spot and stock,, but most people will not find this very successful due to the many turkey eyes and their general wariness ... to them everything wants a free turkey dinner.
If you have good camo and remain fairly motionless, you do not need a blind. I have various portable ground blinds for the spring, but most times I don't even use them and have good success. That said, it gets pretty cold in late November/early December ... that's when I sit comfortable on a tri-pod stool in my 3-man popup blind heated by my 5,000 BTU adjustable portable heater. I have had approx. 300 birds come within a couple feet of my blind trying to look in, and then launch over the top ... one would go, then half a dozen, then a couple, then a dozen, etc for over 20 minutes. It was take your pick.