Just to show my thought process of what to recruit, I usually try to think of 2 seasons ahead, to avoid the situation of not having enough players in any particular spots.
Center: 3; 2 RS Juniors 1 Freshman (redshirting). Debateable to try and grab another one this season, since one of the Juniors is 99 and could feasibly leave early, plus at the end of next season, I'll just have 1 Center.
QB's 4; 1 RS Senior, 1 RS Sophomore, 1 Freshman (Redshirting), 1 Sophomore(Redshirting). Don't need a QB, but since there's 1 or 2 5 stars with me first, I'll throw some minutes their way.
HB: 4; 2 RS Juniors, 1 RS Sophomore, 1 Sophomore(Redshirting). Lost 1 HB early to draft before the season, only 4 left. End of next season I'll only have 2 left, so I'll look for at least 1 HB.
FB: 1; Converted Freshman HB and is not really a good FB. Looking to get a FB that would be better, perhaps to move that HB back to HB, which would fix the HB problem, but he also might have a screwed up developement.
WR 7; 1 Junior, 2 RS Sophomore, 1 Sophomore, 2 RS Freshman, 1 Sophomore(Redshirting). I do not need another WR, but like QB, I'll throw some minutes on a 5 star WR that has me #1.
TE: 2; 1 Sophomore, 1 Freshman. I'd like another one, and if there's one that'll be better than either of these, I'll go after.
Tackles: 5; 1 RS Senior, 2 RS Sophomore, 2 RS Freshman, 1 Freshman (Redshirting). Won't go after a tackle unless it's a high star player with me as #1
Guards: 6; 1 RS Senior, 1 Junior, 1 RS Junior, 2 Juniors (Redshirting), 1 RS Freshman. Might go after some younger Guards, as a couple of my guards are JUCO guards.
DE's: 8; 2 RS Seniors, 1 RS Junior, 2 Redshirt Freshman, 3 Freshman (Redshirting). I do not plan on going after any DE's, same reasoning as WR's
DT: 4; 1 RS Senior, 1 RS Junior, 1 Junior (Redshirting), 1 Sophomore(Redshirting). 2 of these are converted DE's and are probably too small. Looking for some DT's.
MLB: 5; 3 RS Seniors, 1 Junior (Redshirting), 1 Sophomore (Redshirting). Early commitment from 1 MLB already, looking for another 1 or 2.
OLB: 6; 1 RS Senior, 3 RS Juniors, 1 Sophomore(Redshirting), 1 Freshman (Redshirting). Looking for some OLB's, as I'll be down to 2 after next season.
CB: 7; 3 RS Seniors, 1 RS Junior, 1 Junior (Redshirting), 1 Freshman (Redshirting), 1 RS Freshman. Like everyone else, hard time getting any quality players at CB. 1 Senior is a converted Safety, the RS Freshman is a lower quality player who was almost cut. After this season I'll have 3-4 CB's, and they won't match the overrated secondary's I've had in the first few years.
Safety: 6; 2 RS Seniors, 1 RS Junior, 1 Junior, 2 Freshman (Redshirting). Don't really need one as the 2 freshman will probably be starters in a year or 2, but I like to get 1 or 2 safeties a year, as they seem more plentiful than CB's. Always a chance to convert to CB's or even OLB's.
Kicker/Punter: yeah, we all need some luck in this department, unless you've managed to find one already.