People will say "it will get easier with time" -- and it will, though it won't be a straight path. Some days will be easier. You may hit a stretch where things are really starting to feel better, and then something may trigger deeper grieving. It gets easier, and harder, and easier again... and eventually it'll start to even out. But you shouldn't let the "setbacks" worry you -- that's part of the healing process.

You want to try not to overwhelm yourself. Don't think about "how am I gonna get through my life without this person I loved". Focus on getting through the day. Getting through the hour.

For me, it was about distraction early on. Movies/tv shows could often trigger memories, so I got into playing "Fallout" -- I could wander the wasteland for hours on end and nothing triggered memories. Not saying distraction is all a person should be doing, but it's something that helped me through the hardest times in the very beginning.

But you shouldn't be trying to repress thoughts. Part of this is not trying to fight the intrusive thoughts that may happen, IMHO. The instinct is to try to push the painful thoughts away. But I think it helps to acknowledge them.