Any inventor will tell you that you don't follow a plan far before you strike a snag. If, out of 100 ideas you get one that works, it's enough. Take in the ideas of the day, drain off those of yesterday. As to the morrow, time enough to consider it when it becomes today. They may be beaten, but they may start a winning game.
Great minds discuss ideas, average minds discuss events, small minds discuss people.
The beginning, as you will observe, is in your imagination. No army can withstand the strength of an idea whose time has come. Sometimes all you need to open the door is just one more good idea. Only empty heads and empty hearts can do that. An idea can turn to dust or magic, depending on the talent that rubs against it.