How can I remember my late husband in a healthy way without getting trapped in grief?

The most beneficial way to remember the deceased is to pray for him and carry on doing good in his name, not to sink into paralysing sorrow. Gift him supplications, charity and deeds whose reward reaches him; this channels your longing into something useful. Keep good memories and share them with the children so that his memory lives on positively. Carry on living, because that is what those who love you would hope for. If the grief does not ease after months and stops you functioning, get help from a counsellor. Mourning has its time, and rising again is also worship. See du'a & prayer.