There was one time in 1912 the tsarist Duma (which the Bolsheviks and Mensheviks had a handful each of deputies in) passed two insurance laws for workers regarding industrial accidents and injuries. The purpose the Tsarists and Kadets who supported this law had was to defuse the rising revolutionary fervor of the masses by granting them some concessions. The actual laws passed were a small step forward, but still quite unsatisfactory: no workers in home industry, enterprises with less than twenty people, agricultural workers, construction workers, workers in the Siberian and Central Asian provinces, invalids, the old and unemployed were disqualified. Only about 20% of industrial workers qualified for the law!
Now it may seem at this juncture that the Bolsheviks would have been right to spit on the piecemeal concessions by the feudal state. But in fact, they supported the law's passage, and once it was enacted, made sure to explain the exact terms of the legislation to the workers so they could extract the most benefit from it by putting daily articles in Pravda on the subject and calling meetings on it at which all workers could attend. They also took a lead role in gathering contributions for the workers' part of the insurance fund, and their deputies in the Duma agitated for a higher degree of worker control over the fund. The party itself agitated for extension of the law and even founded a journal called The Problems of Insurance, which Lenin himself frequently wrote for. Using these methods, the insurance issue, which the government had intended to use as a way to stabilize itself, was turned into a means for mobilizing the class-conscious proletariat against it! The Bolsheviks organized strikes and demonstrations on the issue, and during the imperialist war the insurance funds had 2 million worker members, among whom the influence of the Bolsheviks was immense.
I think that the Bolsheviks' approach to the insurance issue sets a model for how revolutionaries should deal with reforms. As Lenin said:
... any movement of the proletariat, however small, however modest he may be at the start, however slight its occasion, inevitably threatens to outgrow its immediate aims and to develop into a force irreconcilable to the entire old order and destructive of it. The movement of the proletariat, by reason of the essential peculiarities of the position of this class under capitalism, has a marked tendency to develop into a desperate, all-out struggle, a struggle for complete victory over all the dark forces of exploitation and oppression.
Revolutionaries must remember how important reforms are, especially in the current period of reaction. Of course, we must recognize, and tell the workers, as the Bolsheviks did, that reforms must not be pursued for their own sake as they are no fundamental change for the lot of workers. This fundamental change can only come through revolution, and the workers must understand and appreciate this.