Push past your inhibitions.
bluff CREATIVELY given the board texture and get over your fear of being called. 3 bet, 4 bet, or 5 bet light. If you get called, then so be it. Make thin calls when you feel you have it after constructing a range and figured he has alot of bluffs in his range even though there's a HUGE chance you can be beat. If you're wrong, so be it. Make great laydowns when you feel he has it, even though you could have him beat. Lose your buy-in or your entire roll just to get over that fear of losing it.
These emotions weigh us down when we start off, but a SIGNIFICANT improvement is when we are uninhibited by them.
Learn how to construct a range and to study board texture.
And watch analysis videos online from poker pros. I like Doug Polk's videos especially. Sometimes you're introduced to a new line of thinking that you hadn't thought of before. And sometimes when you watch poker clips of poker pros, when you get alot better, you'll start to understand their line of thinking without needing the commentary