Different methods.....

Abby
Have seen a lot of ladies post about different ways of trying to get that BFP
I'd like someone to explain some for my and everyone else's benefit. Also there's some terms I'd like to know the meaning of if anyone knows them; 
- Af 
- what is preseed? 
- what is the sperm to egg method? 
- what is astroglide?  
Any help, info or tips would be amazingly appreciated!!! :D