Have you thought of putting them into a little book spread over a week, or even a fortnight…whatever span of time suits. I used to have this problem and problem for me it was as my intentions filled a small book over every day of the year and grew most daily. It got to be one big headache! It does not have to be I dont think…for me however it became that.
Nowadays I pray for those who have asked for my prayers, those who need them and all those for whom I ought to pray. This covers everyone, and everything, no exceptions. Other than that, the intentions at the conclusion of Morning and Evening Prayer in the Daily Prayer from The Divine Office in the course of a year cover absolutely every single intention one could think of and in this way we unite ourselves with the intentions of The Universal Church.