Position the armrests so you can lock your elbows against them. Very important for steep turns. 2 degrees nose up pitch for roll in and out of turn, 2.5 degrees pitch up in the turn.
Stalls - The CRJ has enough power to recover without any altitude loss. The trick is to memorize the profiles and callouts well, then figure out the necessaary elevator back pressure to stay in the flight director. Too little and you will lose more than the requisite 100' in recovery, too much and you will enter a secondary stall followed by stick pusher and the ragdoll oscillation phenomenon. Just right and you may or may not get the stick shaker, if so don't freak out, but don't let it get ANY slower.
On V1 cuts, you will start to veer towards the dead engine. If you rotate while veering you will strike a wing tip and crash. You must take off in a forward slip where the correct amount of rudder is that which alligns you with the centerline. You don't have to return to the centerline, just get parallel with it before you rotate. After you break ground adjust rudder pressure to center the ball and make sure to keep it centered for every speed, power, or config change.
On landings you will usually have 8-10 knots of crosswind programmed in, but unlike the real world it won't kick in until you're 100' agl. You have to anticipate it.
There are 3 types of V1 cuts, a flameout, a thrust reverser deploy, and a fire/severe damage scenario. Its important to recognize which failure you're dealing with, not only because the memory items and checklists are different, but because the aircraft performance is different. A flameout results in single engine climb performance, no big deal, it actually gives you more time to deal with the correct procedures for each climb segment. A thrust reverser deployment is next to zero climb performance, a bigger deal, managing V2 and coordinantion is critical. An engine fire usually is the highest workload, because you have to put out the fire while maintaining situational awareness of your climb segments and config changes.
You will have a profile for a missed approach and a profile for a V1 engine fire. You may or may not have a profile for an engine fire at the moment you go missed but you will be required to do them simultaneously, daunting if you're not prepared, perfectly manageable if you are.
The CRJ is very easy to fly when things are going right. In the sim everything is going wrong and Crew Coordination is paramount. You and your partner must both be well prepared and choreographed. When I did my 1900 FO to CRJ FO transition I was prepared but the guy next to me who was doing the 1900 CA to CRJ CA transition was not. It wasn't pretty. Unlikely, but if you have a problem with either your partner or your instructor make sure you speak up.