We're not big fish fans here although we do try to eat it at least once a week to be healthy... probably our least favourite meal of the week though.
We usually end up having salmon as that's the only fish I like (although dh also likes cod - preferably battered and with chips - so he does get that occasionally and I get something completely different for me)
I just do it in the microwave - 2 decent sized fillets take 3.5 - 4 minutes on medium in my microwave. I've got a little pot thing specifically for cooking fish in the m/w, so the juice drains off and it's all covered.
I usually just cook it with a squeeze of lemon juice or a splash or 3 of angostura bitters to give it a bit of moisture. Then serve with some hollandaise sauce.
If it's summer I'll serve it with new potatoes (5 mins to cook enough for the 2 of us in the m/w) and a tossed salad, so the whole thing is a very quick meal. Or if I have nice fresh bread and am feeling lazy in a hurry, then I'll have it with salad and fresh bread.
If it's winter then still serve with potatoes but with veg instead of salad.
Before having ds2 I used to eat smoked salmon as well but I don't tend to eat it much any more.
However, it did make for easy and quick meals. One of my favourites was to cook some pasta, drain it and then stir in some roughly chopped smoked salmon, a splosh of cream (or plain yoghurt or creme fraiche or philadelphia-type cream cheese - I always keep a couple of those little individual pots in the fridge for just such occasions), a splosh of vodka/sherry/angostura bitters (assuming the dc aren't having any as they are still little!) or lemon/lime/orange juice. If I had any around, I'd also add some fresh herbs chopped quite finely (dill, basil or parsley worked well) or chopped capers or olives, roughly chopped spring onions, shallots, baby plum tomatoes, spinach leaves, chicory, etc - you get the picture, it's very versatile, most things that go nicely with smoked salmon can be thrown in, depending on what you have in the fridge.
You can also a spoonful or two of the dill mustard that you would normally have with gravadlax to give it another dimension.
If you use fresh pasta, it can all be on the table in 5 minutes, while the pasta is cooking you can chop up the bits you want in the sauce. Throw them in once the pasta is drained and by the time you've stirred it all together it is all warm enough.
Oh and it's a good idea to keep a little bit of the pasta water back when you drain it - you can add it to the sauce to thin it down a bit without it tasting watery or going all thin, helps it to coat the pasta really well without adding loads of creamy calories or sacrificing taste!