There's no reason why you can't do both. Sure, if you have time, try to resolve the off-balance straight away, and then later remind yourself of how you were off-balance earlier in the day. Take it for a meditation. Open it up, try to look at it deeper.
Try also to solve it immediately in the moment it occurs, if you can. If you can't, or if you feel it wasn't solved fully, definitely open it up later, look at it from every direction, so you develop more wisdom.
Within this practice there's basically two places that we end our mental difficulties.
One is in the moment, where we change our reaction. And there are two ways how we can stop our Dukkha arising or continuing in the moment. One is, with good mindfulness, good awareness we might just note something, then let it go. The other is we might do a quick reflection, then let it go. That's fine, that's one place where we can what they call "cut the chain". However, normally that just cuts it at the time, but it doesn't make it strong enough for the future, so often the same thing will happen again.
So we need the second place of what they call, "cutting the chain", and that is developing our wisdom; stopping our ignorance. That's where the reflection meditations work directly to get our wisdom straight on a deeper level. The use of mindfulness techniques can cut off the anger; cut off the fear/whatever, in the present moment. We note it; we come back; it's gone, fine. But it may still come back again unless we develop deeper wisdom, which then "up-roots" the problem. For example, mindfulness is as if we take all the leaves off a tree and it looks dead. Taking all the leaves off a tree will usually not kill a tree, they will grow new leaves; but if you up-root the tree, dig it totally out from the ground, the tree can never grow again. So sometimes mindfulness, and our concentration work, in particular, are like just pulling the leaves off a tree, they end the problem in the moment. It looks like it's gone, but they will come back again. So it's the deeper wisdom practice we need to up-root our mental problems.