i couldn't sleep, so i thought i'd make a thread.
i see a lot of strat threads here where people disagree about both preflop and postflop play in hands where we are in in the blinds vs. a steal. i'm going to go over some pretty basic concepts, which will hopefully help you a little with that and focus more on other things.
before i get into all of that though, first i should say that its ok to play suboptimally from the blinds when you're still working on other things. its not easy to play oop, and having some sort of a nitty, training wheels kind of approach to blind play is ok when you're getting started. folding a hand oop that you're not really sure what to do with is never really that bad. never going back at some point and thinking about what to do with it is pretty bad on the other hand.
if i had to make a generalization about leaks of microregs in blind defense, i would say that the most common errors are:
too much 3 betting
not enough calling
too much check raising otf
not enough donking otf
beyond flop play is going to be going a little further than the scope of this post, but i'll try to cover these things in a way that's easy.
before the flop, most of your tough decisions will be with medium-strong hands. the kind of hands you might raise from mp with, things like K

J

, A

T

, etc. you will usually be ahead of the opening range of a stealer, so folding doesn't seem right, but calling oop feels gross, and raising seems to overplay our hand strength. so, what's best? well, that depends on our villain and his ranges of course.
villains that you want to 3bet with good big card hands:
agrofish - they have a wide opening range as well as a wide calling range, so a hand like KQo is very good against this type of player for value.
toughguy regs - like any reg, they will steal a lot, but they will also defend a lot with hands like 8

6

. you should exploit this the same way you do vs. the agrofish, because even though the toughguy reg isn't as stupid as the agrofish, his range is almost as crappy.
villains you don't want to 3bet with good big card hands (that arent premium):
lpass stations - while a guy that is 40/5 would call your 3bet with a lot of hands, he doesn't have very many bad hands to call you with in the first place, since he just limps in with everything but really strong holdings.
abc regs - while these guys will steal with wide ranges, just like toughguy regs, they will fold everything worse than this, and their remaining range will crush you. don't waste these profitable calling hands on a bluff you could run with a much lesser hand.
these are just generalizations, and its not always easy deciding exactly where to draw the lines between raising, calling, and folding, but if you just keep in mind the simple concept of staying ahead of your opponents range, you will usually be able to turn a profit. also, try not to forget that peoples' cutoff ranges aren't the same as their button ranges, and that you shouldn't be calling/3betting as if they are.
i think there's tons of good advice and strat for oop 3b spots here, but there's relatively less content on the oop hands where we just call and take a flop. post-flop play is obviously a lot more complicated than preflop play, but i'll try to hit on a few things that might be a good starting point.
donking vs. c/raising
a lot of you guys just don't ever donk, ever, which is completely ridiculous. by doing that, you really lower the ammount of flops that you can legitimately bluff vs. a non-horrible player. there are certain flop attributes that favor donking, and certain attributes that favor c/raising, and they apply to both bluffing and value betting.
attributes that favor c/raising:
-high probability of cbet
-high # of strong combinations in our percieved range
-low probability of ever being reraised by total air
example - 9

7

4

is a flop where our percieved range could contain 3 sets as well as some strong draws and possibly a couple of overpairs. a check/raise on this board will almost never be reraised by a hand like Q

J

. you can't really ever count on people to fold decent hands, but at least not getting rebluffed by total crap is good.
attributes that favor donking:
-lessened probability of cbet
-low credibility of value c/r
-low probability of being raised by air
examples - a flop such as 6

7

9

might be more suited for donking than c/raising vs. an opponent who will check often on such a coordinated board. a flop like A

9

6

might be better for donking, since we could not often value c/r, although usually not ideal because of the high probability of cbet, which is why you will often see c/c on these types of boards.
both forms of agression should be kept to low ammounts in situations that lead to very unpredictable results.
example - flop is 9

9

4

. sweet! that totally misses this guys range. time to bet with my 77! ****, raised. now what? this is bad. a lot of new players try to make a lot of moves (or ill-concieved value bets) on these ultradry boards, figuring that it misses their opponents range. the problem is that its completely transparent, and gets met with unpredictable results vs. most all players. that sounds bad enough already, but its compounded by the fact that we're oop, and additionally by the fact that villains range can have premium pairs in it, and ours cant. its ok to just give up with your air on these boards and play somewhat weak tight with not-great made hands. if you play really actively in these situations, you will lose in the long run.
anyways, like i said before, these are just some general concepts that might give you something to think about and expand on. there's always lots of gray area, but hopefully it makes it a little easier.