First of all this is not a guide to the 100% completion but a few helpful tips to make the journey a bit more streamlined. I wanted to share some ideas I used which made it more straight forward, here goes…General Tip:
Register at Social Club then navigate to ‘Games’ > ‘Career’ > ‘Checklist’ tab, link here:https://socialclub.rockstargames.com/signup
I finished the story missions first then went about completing ‘Hobbies & Pastimes’ and ‘Strangers & Freaks’. If you do this you will find many of the ‘Misc’ requirements are completed along the way. Any which aren't, like ‘get a tattoo’ etc. are simple enough to get.Collectables:
For all ‘Spaceship Parts’, ‘Nuclear Waste’, ‘Letter Scraps’ and ‘Under the Bridge & Knife Flights’ use the map guides provided by Achievement Hunter at the following link: http://maps.achievementhunter.com/guides/overview/grandtheft... (all credit to Achievement Hunter and its original author/s)
These maps are incredibly detailed, with mission filters and embedded videos that you can ‘mark as completed’ which then update on the map, an invaluable tool.
** Use Trevor and the Buzzard Helicopter for Under the Bridge challenges and Quick Save with your mobile regularly.
** Use Trevor and the Crop Duster plane for Knife Flights, it is really manoeuvrable but again, quick save before and after a successful knife.
** Stunt Jumps. If you play online, rank up quickly by doing ‘Downtown Underground’ race and you also unlock the achievement ‘Show Off’ – complete all stunt jumps.
Be aware, you still are required to complete ‘Stunt Jumps’ but if you have played online and got this already you'll ONLY have to do 25 as outlined under ‘Misc’ in the Checklist.
** Use Franklin to do the Street Races, make sure you get a car modded and use it to easily win. Hao will call/text when a new race is available, either save to pass time or go do some other activity until it becomes available. (Note: races 20:00-05:00)
** For the final Street Race a Motorcycle is needed. I would recommend replaying the Mission, ‘Jewel Heist’ and follow steps outlined in this thread: http://gtaforums.com/topic/598788-pegassi-bati-801rr-locatio... (All credit to ‘Edub_1234’ for the steps needed)
Once you have the Pegassi Bati801RR put it in Franklin’s garage and use it for that last street race.
** Use Michael for the Triathlons. Once you have completed the ‘Strangers & Freaks’ mission, ‘Death At Sea’ (you have to purchase the Sonar Collections Dock too)
What this does is builds maximum lung capacity whilst completing the mission which allows you to compete easily in the swimming stage.
Swim underwater for longer with less button mashing as believe me the final race, ‘Coyote Cross Country’ is huge. Also, Michael should by this stage of the game be maxed in stamina etc.Misc:
Once at this stage you will be ready to clean up these last few requirements. I advise calling Trevor up to ‘Hang Out’ (playing as Michael)
You should go and play tennis, darts, visit the cinema and go for drinks, visit the strip club all in one hit if you can. Sometimes he says, “that’s enough drop me off..” but just call Franklin if he does.
Go to the Strip Club and max out the ‘Like’ meter of Juliet (Red thong Blond hair)
guaranteed to go home with you and get that ‘Booty Call’ requirement.
Hope this gives you some helpful tips
on making the 100% a little more straightforward.
I have never produced a ‘solution’ before so if there are errors or mistakes please accept my apologies in advance and comment below with any issues for an edit.