Completed all 1000 points today.
I really have mixed feelings about the game, because as much as I like some of the elements, the game feels like it was shoveled out the door around 75% complete. The story was quite short, the cut scenes laughable and 90% of the land area was just a blank Speedtree canvas.
For the more annoying parts of the game, here is how I tackled them:
Military base takeovers with tanks: no one thing worked every time, but a combination of helicopter assaults(watch those SAM sites!), skirting the edge of the base, heavy dropping the Prototype truck, the last Guerilla weapon(grenade launcher)and sheer perserverance got me through.
Side Missions: OK these were tedious. My strategy was to pick an area that had at least one helicopter gunship spawn, then only pick the missions involving destroying a target or a delivery. If you get a bad assignment(capture the sports car, ugh!) simply go back to your contact and press "A" for a new mission.