There will always be those players who start writing coaches while still in their freshman and sophomore years. If this is your style, go for it.
To learn how to get recruited, though, you have to maintain regular contact with coaches for the duration of your time in high school. If as a sophomore you write a coach and then proceed to fall off the face of the earth until your senior year, you haven't done yourself any good.
If you do start self-recruiting as a sophomore, in addition to maintaining regular contact with your candidate coaches, you should send an updated resume after your junior fall season.
The bottom line for would-be early starters: Begin self-recruiting only when you're prepared to invest yourself consistently. You must correspond with your candidate coaches regularly—not just sporadically, when the spirit moves you.

