Recently published Nature commentary on "So you want to be a computational biologist?" by Nick Loman & Mick Watson give advice when starting out on computational projects. http://www.nature.com/nbt/journal/v31/n11/full/nbt.2740.html
Corpas M, Fatumo S, Schneider R. (2012) How not to be a bioinformatician. Source Code Biol Med. 7(1):3. [link]
Wilson G, Aruliah DA, Brown CT, Chue Hong NP, Davis M, Guy RT, Haddock SHD, Huff K, Mitchell IM, Plumbley M, Waugh B, White EP,...
One of my favourite lecture notes on "String Matching Problems and Bioinformatics" http://users.csc.calpoly.edu/~dekhtyar/448-Spring2013/lectures/lec03.448.pdf