Bovada lets you import your hand histories after a few days. I would diligently review them. It's especially valuable because you get the see the hole cards of everybody at the table, not just your own and the villains. Take your notes. Share and debate your observations with other players you know.
Do this for thousands of hands, and eventually you'll develop a feel for how players play hands of all variant strengths from early, middle, late positions. Top pair medium kicker, sets, top pair weak kicker, gutshot draws, flush draws, air hands like middle pair, backdoor draws, overcards, etc. What kind of bet sizes can they call? Do you start to notice correlations in bet sizing and their hand strength.
This in the long term, along with developing your reads, also helps you internalize fold equity - you put them on a hand range, and if you think you can push them off - choosing the right bet size is key.
It's the single most useful thing you can do. You can analyze a hundred different facets of poker if you put the time in it.
Hands you folded and you're wondering whether you made the right laydown, see if he was bluffing. When you were bluffed out, were their commonalities in those hands? Were you in a positional disadvantage or advantage, what kind of boards were they, did you call the flop or turn just hoping he would shut down or were you confident in having the best hand and committed to calling down?
When you c-bet bluff with a missed AK, what kinds of boards did your c-bets generate the most folds? What boards did they almost never work? What kind of hands were they folding or calling with, and continuing on the turn with? Optimizing your c-bet game alone will save you from burning money.
As an aside, on Bovada, you can afford to play tighter, unlike sites with screennames where if you're a huge nit who only raises the big pocket pairs people figure it out and stop giving you action. Bovada is a site specifically designed for you to extract max value with your monster hands without having to balance your range. You don't need for the rest of the table to see you being aggressive preflop with 109s to keep getting action.
Evaluate your preflop play - did you call raises with speculative hands trying to hit the flop hard? Did you call the flop in a multiway flop with a weak pair when you know you're behind? Are you getting into reverse-implied odds
spots, like drawing with a 9 high flush in a multiway pot where someone likely has the king-high or nut flush draw? Did you overplay bottom two pair on the turn? I bet that a lot of your lost buy-ins started with one small preflop mistake that compounded itself as the hand progressed.
These are leaks you can get rid of without having to invest in poker software.